Bash is magic # No it's not

um welcome to bashes magic no it's not

you get this joke probably not the right

talk for you you saw it time to go no

there another rooms you don't have no

idea what this means you are definitely

the right place so quickly I'm Dwayne 

 Pantheon I'll get back to

that in a minute

I have been the last year fall in love

with crochet it's like the really fun

Amy to do so if you're talked about

crochet please let's talk about it I

make scarves and hats and whatnot in

octopus's I love love comics as we'll

talk about those and karaoke we karaoke

last night why not tonight

every night's karaoke night all my

slides for this talk and everything I'll

ever give in my life is probably over

our website MC Dwayne comm that's

actually where you should go right now

get these slides up if you go to my

websites the very top link will take you

to the description and there's a link to

the slides in there the slides are

actually open for comment from anyone so

I would love your feedback this is the

second time I've given this talk and I

desperately need feedback to make it

better for the future before I move on

quick talk about Pantheon um who here is

familiar with Pantheon that's pretty

much the whole room but for those of you

who might not be there wasn't on Drupal

TV or YouTube later Pantheon is a

website operations platform that helps

people that are operating a web site

meaning the developers the designers the

project managers the stakeholders you

had better communication strategies I

always like to quote Kelly Albright

DevOps is not about tools it's about

communication and we really do help with

that problem and we'd love to talk to

you about automation and that's really

one of the reasons I'm doing this but

before I go on and talk about why this

is automation ultimately I just want to

quit a quick poll of people in the room

all right everybody's your hand if you

came into this room because you saw the

talk description and said I want to see

that talk that's everybody good we're a

hundred percent almost hundred percent

he doesn't raise their hand now here is

a developer full-time that's all they do

is develop who here is a designer who

here is a content a content creator

writer editor yeah believer and I think

you're gonna get a lot out of this talk

is there any business people in here

sales folks otherwise

good good actually this is super helpful

for folks like you as well it's helpful

for everybody who here this is like the

ultimate who here owns a computer it's

still the person on the computer that

same person for those of you at home not

gonna call any names I have a hundred

and fourteen slides ish no we're not

gonna go through every single one on

today and then explain them all in

detail and I'm definitely not gonna read

them to you but if you are a novice and

you have no idea what bashes just sit

there take some notes I highly encourage

you to take notes it's the best way to

acquire new skills I think is to take

notes first if you know a little bit

about Bosch open up your terminal let's

fly along at home about halfway through

it's gonna kick in where you can just

start playing along at home and you

might pick up a few things and if you

are an advanced user and you know what

that says just do that if you don't know

what that says cut yourself in the one

would love categories slide 106 and

below is for you and we should have some

fun with this so bash we're here to talk

about the magic that is bash and we

think of magic we think of well fun like

card tricks and kids birthday parties

and wonderful stuff or we think of

terrifying things that are really

complex that if you know what you're

doing with it this is a really cool card

you can win a game with this card it's

actually legal in current turn

tournament play but if you don't know

what this is it's just an evil looking

thing that's kind of scary it's a little

bit overwhelming amount of text like

what on earth do I do with this I don't

know what most of that means looks cool

but it's also looks scary

when husbands talk together for business

users in their room actually we bounced

a bunch of ideas off of one of my

colleagues heads and Ben who was in

sales he said you know what this thing

you're describing kind of sounds like

the whole point open source to me like

smart people leveraging smart tools and

intelligent way they're signing together

and it was like this epiphany moment for

me is like if I can make everyone get

that then man I can totally win this so

that's where I kind of based the rest of

this off of because we are terrified of

things we don't understand it is human

nature if we don't understand a thing no

matter how benign it is no matter how

ultimately you're cute it is we're gonna

be like this kid and we're gonna freak

the heck out especially when you hear

stories like this now this isn't a true

story turns out this was a giant hoax so

don't worry this didn't actually happen

but I have seen in production enough of

my life people take down entire racks of

things my accident people accidentally

wipe out their entire project and I have

to start over from the last time they

saved there's a lot of horrible stories

where you hear it's like oh my goodness

bash is terrifying bash is scary it is

the most intimidating user experience in

the world there's just a cursor and you

have to know what to do with we're all

terrified of breaking our machines we're

all and we all set up our machines to do

exactly what we want them to do and

sometimes it takes us weeks months then

we've been using the same machine for

years for a reason not because it's the

best machine on the market but because

it's set up the exact way we want it

we're terrified of changing that because

we know the time investment it took and

who knows how to go through those GUI

screens again who here's our setup ma'am

all isn't that fun to make it agree with

your PHP and my sequel version no no

that's the terrified so I use lando but

every single developer I've ever talked

to that uses bash says yeah there's a

legitimate underlying fear there sure

it's powerful but don't be afraid of it

just embrace the thing

and it's easy to say this it is so easy

to say to someone that doesn't know what

they're doing this scares like just

don't be afraid but how many times does

that ever work for you when you're

terrified if someone says just don't be

afraid don't worry about the giant

spinning blades they're they're fine but

here's the amazing part you have at your

disposal a more RAW processing power

than we had when we put astronauts on

the moon by like a 10,000 factor an

iPhone 5 has 13 hundred percent more

processing power than all of the Apollo

missions had put together you're talking

about Bosch which is close to 40 years

old and like the technology it's doing

how could have you gotten on like Mac OS

R on the iOS just in the last decade how

much better did this tool get over that

last same period of time how many things

can your computer do that you currently

can't access turns out it's almost

infinite because once you understand

like what this does your machines yours

and this that's not the true sense in

nature of open source that I have the

right to look at the code and manipulate

the code but if I don't understand the

machine that it's running on I'd only

get you so far so you can unlock all of

the potential of your machine through

this wonderful wonderful little thing

called bash but why would I know in this

room actually care to do bash sure

that's great that's a wonderful speech

like it's powerful wonderful I want to

empower everyone in the world and I

really do but I work with a lot of

developers in the world I train a lot of

people at Pantheon on Pantheon and I

watch people go through GUI screens to

do everything and it's just slow and I'm

like disabled of your life this is how

you do all these things and there's

nothing wrong with the GUI I will never

ever talk down about a GUI in general

but that GUI was built by a developer

and the developer has a specific goal

with it GUI in mind not to let you do

everything that tool could possibly do

that would be a giant laundry list of

click boxes and buttons and whatnot

their goal is to make the interface

intuitive and

easy to do the things that you probably

wanted to do and that's awesome but it

can do so much more and it's also really

slow to go in and click buttons who here

really likes the CMI click button

interface and how fast it is that's

single hand drush is so much faster to

get your config imported it's just

ridiculously much faster it's like I

don't even know why we have a GUI

honestly it's just that much faster but

it's not just that it's one individual

button click it's exactly to do the same

button clicks over and over and over and

over and over again real life story I do

a weekly demo of Pantheon about half the

weeks of the year and I have to open 8

tabs for it and at the end of it I have

to do a like 6 cleanup steps to put

myself back to a proper state so I can

do that demo again and I got sick of

doing it so I have to batch scripts what

opens one closes the clothes because

there's only cleanup work for me so

instead of 8 tabs I need to manually

open our own run script instead of all

these sip cleanup steps I have to do

which include get pushes I just run

script and it just does it so you can

speed up everything immensely and

eventually you're gonna run into a tool

with anything you do in computer science

not just web dev anything where

someone's gonna say something like this

I got a tool for that it's in the repo

just go grab it and if you don't know

what that means they might as well be

speaking some weird foreign language

that like makes no sense cuz they

literally are they are speaking the

language of bash which is we'll talk

about later this beautiful common

language that we all share even though

no one's quite as fluent in and it is

anyone else thinks they are we'll get to

that

and the real power here is that we know

that fundamentally that advanced

developers can take these things called

scripts and literally do amazing things

with it if in the end the speaker notes

for these slides if you have full access

to as links to all this stuff

this is telnet blinking like tile that

blinking like that and Al you can watch

all the Star Wars and ASCII

this is just bash people you can do

anything with it but that's why that's

why is because you can do things faster

you can automate all the things and if

you can animate one thing you can

automate literally anything so if I can

automate Chrome opening eight tabs or

Firefox opening eight tabs I can

automate calling the third-party tool to

do a visual regression test there's no

difference batch doesn't care what the

file does it just is doing the exact

same thing but what what did I just say

bash is doing something so what are we

talking about here that's why I came in

this room we were talking about the

blowing in shell this is the official

logo for bash

that's in the repo it's beautiful so why

is it born again shell because there was

a guy named Steven born and he worked

for a company called Bell Labs and they

wrote this thing called Unix and there's

Berkeley UNIX and there was Bell Labs

UNIX and there was early day UNIX and he

realized that there's this fundamental

problem that they had to solve and what

he's trying to solve was inside of this

beautiful file system that his UNIX how

do we move things around and how do we

read those things to know what to do

with them that's literally what shell is

it's a shell access he's not the first

person to write a shell it wasn't the

last we'll talk about why this was

actually super valuable but that's good

there later so what does bash actually

do for those of you who in the room that

have ever looked at the Wikipedia

article like I did you'll see this

I love this definition and I think it's

way too long at the same time tech

commands cause actions that is a

fundamental thing you do with Bosch now

for those of you who don't use Bosch

does that sound fundamentally scary you

can type a command and it will do a

thing anybody all right no hands went up

and I don't if you're just shy if you

are that's fine but is this scary a

telegraph a little bit because of

electricity I think those wires by the

way those Steve persia's actual

grandfather is Telegraph machine that

human telegraphy and but you have to

learn how to take yes you learn after

you have to learn how to type something

so it's a little intimidating that you

have to know how to type on it but the

fundamental idea of a telegraph is very

simple I'm gonna send a signal from here

to there that fundamental concept in and

of itself isn't shown too scary that's

what I'm doing right now I'm sending a

message from here to you broadcasting it

mildly with my voice this is just doing

electronically from point A to point B

guess what that is all the terminal does

it points in the message or point A to

point B I guess what that's actually all

Alexa does if you look at Alexa's actual

documentation this is my favorite I dug

through a bunch of their Docs it's my

favorite like one that actually comes up

quickly on Google again the links in the

in the speaker notes what Alexa

basically does this is this is super

simplified version but it uses natural

language processing to write down a text

message of what you said so I say hey

Alexa what's the weather it's gonna

write that down and it's gonna send it

off to a third-party service somewhere

else in space lambda whatever send it

back and that's just service makes

another text message to send back and

Alexa just read you that text message

that's all X's is a fancy text messaging

machine that hooked up to cool back-end

services they can do a lot of really

cool stuff and then Alexa itself can

also do interesting things bass

text message they can see what the cards

and other interesting things he can do

but that's it we're communicating with

our machines Bosch is a way for you to

write little short messages directly to

your operating system all it really does

with those messages is move files around

and in UNIX all files are folder all

folders or files so even there it's just

moving files around but it's movie files

folders

who here is a contaminated by moving a

file to a folder like no like that with

a GUI we never would be that's a silly

question obviously on the surface that's

really all bash and its heart is doing

is saying I want this file to move over

here or I want to read that file and

figure out what the heck to do with it

we'll get to what those headers mean and

why headers are important a little bit

later we'll talk scripting but that's

all really doing then we're gonna move

it around and then read the file figure

out what the heck to do with it it's

ubiquitous so I use this computer

because it's like well it computes for

you it does the thing that the file says

to do but even windows got on board with

this with the Linux Windows 10 developer

edition with a Linux subsystem because

they're like yeah you're right this is

the most ubiquitous system that ever

gotten written in the history of the

world and if you can use it in one place

you can use it everywhere on every

machine you ever touch the entire rest

of your life thanks to - or ball

but if not just machines that you're

actively logging into as assistant men

and typing on who here uses a build

system of any sort all right who here

doesn't really know what those things

are and it's fine if you don't awesome

in the dumbest simplest terms I can put

it into not dumb in the simplest terms I

put it into which for me is like yeah

sorry it is a bash script running on a

machine you don't own that is pretty

much all circle CIS there's

configuration for it sure there's knobs

and whistles and bells but how do you

make a script run on one of these though

you give it a script to run and then put

a little things around it to say oh I

may even authenticate as me and you can

cut you can get into this github repo

and you can have access to push to here

fundamentally it's just bash with again

wow knobs and whistles around it but if

you understand what those files are and

how to read them then human readable

versions of them then you're doing the

same thing bash can do you can do it

bash can do it and you can automate it

that gets me very excited overall so

from here on out is a tutorial on the

basics of bash and again if you are bash

user everyday let's skip slide 106 and

just start reading and I guarantee you

will probably get something very

important out of that for the rest of

your life everyone else though again if

you're brand new to this know that you

can do these things if you're on a

wonder Mac or Linux machine just open it

up it's the terminal it's beautiful

there's a billion different kind of

terminals I will say bash it was one of

the solutions I forgot to say why it's

called bash cuz we talked about the born

again she'll start about that so Steven

born Ruth the shell for Bell Labs 1988 a

guy named Richard Stallman was working

with his team and said you know what

shells a really good idea we should

rewrite this and make it open source

so they wrote a new open source one and

said what should we call it well the

born again shell bash that's why I've

been bash is literally on every machine

you'll probably ever touch somewhere on

that machine it literally comes from the

heart of open source from the new

movement we have the right to tear this

thing apart and rebuild in our whatever

purpose we want to to look at the code

to manipulate it that lab said we

couldn't they just wanted us to use it

we got to extend this guy's work and it

was written by people like us by

open-source nerds I was just at nerd

summit that joke played better there

there's something up in Amherst

but bash is everywhere so just open up a

bash terminal if you're on Windows

you're gonna have to either install the

Linux subsystem or get bash just

download kit and you get a beautiful

bash client there is it full-featured no

does it work yeah can you do everything

with it yeah you're running the issues

around composer actually but we'll get

there so how the rest of this entire

deck is laid out are these four general

ideas that I'm gonna walk through and

then there's a bunch of best practices

and then I'm gonna tell you a little bit

at the end of how you can do this very

very safely without any fear of messing

up anything on your computer at all and

just how to have fun with it

because once you embrace it it's

actually super fun to make your machine

do anything you want

now if you have no idea what this is

intimidating as heck this is like

literally a terrifying screen if you

know what this is this is a beautiful

display of the access rights who owns my

code like a lot of metadata around it

and it's just a beautiful view of the

world but again if you don't know what

this is it is intimidating as heck so

let's start from the very very beginning

the first thing you see on here at the

top or at the bottom is well where you

type at on most machines it is just

default configured to tell you in this

order computer name current directory

user and then you get the dollar sign

you type after the dollar sign so a lot

of scripts you look up in your life will

start with a dollar sign don't copy the

dollar sign they'll mess things up that

tilde is a shortcut it just says that's

your home directory so and you look at

your file system it just shows you where

home is for you it's probably your name

this for me standard commands so again

we're talking about moving around a UNIX

file system so one of the first commands

anybody ever learns is PWD present

working directory I've kind of rewritten

what Manuel told me as if I was talking

to alexa because again that's all i'm

doing i'm sending short messages to my

computer so hey bash jo around that's

all PWD does hey bash what's in this

folder tell us like show me what's in

here you know I meant show me everything

in this folder and then we get to these

wonderful things that's good

dot by itself is a hidden directory

which means present directory so you can

actually invoke tools to say do this in

the directory you're in without having

to type out where directory are in you

can just say hey I'm referencing myself

I have to explain recursion before I

could explain that but

that's all that is two dots means the

level up dot file name means hide it

from me so if I say show me everything

here

great show me everything here there it

is

hidden folders are really nice because

they're like get you don't really want

to see your get folder all the time but

it's really important it's there so you

need to check on it time time who likes

reading manuals awesome I want everyone

to love manuals manuals work on planes

if you're ever like I don't have

anything to read on this plane I got

fifteen minutes to kill tech manual our

type man and any command any command in

the world and probably it's already in

there well written even manual itself

you can man man that's what I did to Bob

and tells you like very plainly Riz so

up here I did an LS a saying hey show me

everything and this is where most people

start getting a little lost

honestly like okay how do I remember

these flags what does these flags even

do there's a zillion variations of this

command it feels like there's a zillion

there's not there's like 40 or something

how do I find them all oh yeah it will

literally tell you just man LS and it

will tell you what every possible flag

is and in your spare time again render

airplanes like your Wi-Fi goes out on

you well time learner else does click in

I've crawled through a lot of manuals

it's actually really fun after a while

yeah we'll get to that we'll actually

get to that good point good point good

point we haven't got to that so far all

we're doing is reading all we're doing

is saying hey tell me where I am tell me

what's in here

tell me everything in here and then code

tell me what the manual says for this

command that was actually do stuff hey I

want to move around moving in a

different directory moving in one level

up one I just recently learned is a CD -

we'll get to that later on but it's

actually super cool but now we're just

moving around again we're not affecting

anything we're just jumping around to

where we're looking now we start doing

stuff hey let's make a directory make

directory make a new folder put a rest

copy something put it from here and

there move it moves actually super

powerful because move just doesn't say

move it from here to here you can move

something from where it is to where it

is with a new name so you can rename a

lot of things very very fast just by

moving them all again there's a thousand

flags to this you can do very very

specific things you can rename entire

sets of directories with one flag it's

pretty cool you can remove things and

this is where all those horror stories

you've ever heard in your life came from

not from this command this is eventually

pretty safe command you'll remove the

thing at a time and you can't remove

entire directories so if you're running

RM on a file you're gonna remove that

file just know that if you're on this

which a lot of things you'll see online

will tell you is RM minus RF this is

literally the only thing I think you

should be wary and scared of and the

entire talk is this this command forget

this folder and you're shouting this by

the way because that's the bf means

force R means recursive everything below

here too so if you change to your root

directory and ran this you're done

you're you've just erased your machine

you probably get it back somehow the

backup time machine but you have just

moved all your files don't run this

unless you specifically know what you're

doing if someone's told you to run it if

you're working with other people wait

for someone to tell you to do this or

you do it but this is the only real

danger this is the big red flag because

you're removing things you can add

things all day and move them around and

copy them and make your X reason no

one's really

because he moved to directory so move it

back just moved it that's all you did

but don't don't force things they feel

like what did I just do

history is there for you in fact how I

made these slides as I were in a history

and look back over two week period in my

life and in an analysis which is also in

the speaker notes from Becca and how

this deck works of how I use bash like

just from a two-week snapshot of like

this is are the commands I actually run

in my day of daily life clearing the

screen I use constantly so much that a

alias did I'll get to that in a second

that's what C is down there that means

clear so short credit it open

this is fun open things you can interact

with the whole rest your machine from

from bash like I could I could I could

jump to my spotlight view and type in

Firefox or get in FF and be right back

in Firefox and I can throw other things

the end of this like let's admit HTTP

[Music]

can't work

and I misspelled it but that's the live

demo well they're not here sitting tight

anyway the point is it does it um so you

can start experimenting with like can I

open this app to the state probably you

can if there's a way you can manipulate

it manually to get to her through the

GUI there's probably a way to open it on

that state is it that useful I use it

every day of my life so I think so but

that's the basics these are the basics

things Bosch does if you have mastered

these like eight things nine things

Wow you're on a really good path the

nine things it's not that hard to

remember

and especially sensors things you

already are doing anyway with the GUI

there's no new concepts of any of this

stuff RM minus RF maybe but that's like

move to trash and delete the trash

folder itself like don't do that

applications and tools again this comes

out of the new world the new world is

all about sharing your tools let's make

tools together to make everything better

for ourselves and some of these are

built-in grep who use grep on the

regular oh yeah for the rest you don't

learn it and once you learn in grep it's

the best search tool that ever got made

by humans it sounds amazing now it only

works on files they can see but you can

easily run a grep the the term and again

there are a zillion ways to use this

there I actually have a I run grep are

and I don't remember all the flag but

there's like five flags and it tells me

exactly the view I want with a count

included but I don't remember those five

things out of time ahead but we'll get

to why I don't remember those things a

little bit later curl one of those

useful tools on earth just pull it

across the internet and display it but

don't just curl and display everything

that's kind of madness curl mines

capital I I use literally on every

website I touch to see if the headers

are right and to see if the varnish is

working on Pantheon sites that's how you

test furnish to see the age of varnish

it's just in the header it just tells

you and it's super fast I need a clue

here for that eventually you'll hit need

to edit a file on the system that's why

we built them our VI or whatever you

pronounce it this actually if you man VI

on a Mac it will tell you it's them I

don't know why I didn't know if that's

an error or what but that's what it says

and I get I get it if you've never

touched VI before it is intimidating

because this is literally how you go

through it I don't stir it escape to go

to command mode

come on WQ to write quitter just queued

yeah so it's like a bunch of hotkeys to

learn but it's worth learning I am here

to tell you is save me a numeral amount

of hours since I started trying to use

it because I don't have to go to another

tool I just like all right I want edit

this thing VI that could that thing jump

to exactly where I want to go because I

remember the hotkeys of how to jump

around and edit it save it I am back to

my terminal back to whatever I was doing

it's super super powerful

there's also Nano if you have no idea

what VI is and you don't want to learn a

bunch of hotkeys nano is just well it

works it just works it's just there it's

another editor literally that's why it's

called now and there are thousands maybe

millions of other command the tools you

can add like if you're a it looks

terrible doesn't brew brew is awesome I

well if anybody tells me about a new

tool the first thing I do is brew

install that tool name and see if it

works sometimes it does and then I just

have a new tool that's awesome

well then other that have to go to the

github I got to figure out how to stall

it and blah blah blah blah blah Linux

it's apt again are not active act mapped

install I guess you should update that

to great in this late at night

brew install you just tell it to install

the package and it will things I've

installed but I think you're super

useful is calculator calc calc is an

amazingly powerful calculator that's I

think easier to use than figuring out

how to type the buttons because who has

like who has a keypad anymore with the

numeric keypad yeah so a few people sure

but this is my entire office a MacBook

Air I'm not joking everything I do I do

on this machine I thought it my home

machine that's true get who you just get

for everything good everybody should use

get for everything get is the best we've

ever figured out version control and for

all humanity especially for sharing I

firmly believe that not one probably

everyone

DuckDuckGo has a command-line interface

which is just amazing so our C mid camp

and this is useful for like okay that's

kind of great that I can hit one and

then like open the mid camp site sure

that's this useful but where I use this

all the time is a get you base previous

probably rollin I get a terrific traffic

I don't know how a cherry picker works

all the time so oh yeah I'm still

looking for documentation really fast in

fact a lot of get documentation

DuckDuckGo we'll just put as the first

thing it sees but all right

I was nerd not about tools I like at

this point I'm a speed up what it's not

links no she's not links not links but

the duct it goes off my standard so it's

standardized in my browser and in my

terminal drush I don't think I have to

say much about rush if you used rush and

you're not tapping into the rest of what

bash can do you are missing out oh man

don't be CLI same same exact comment but

for WordPress users Composer it's not a

require or it's not an option anymore

this is something you can just need to

know and again if you are like using

composer

without understanding bash it's

confusing the terrifying

once you understand oh I'm just reading

a file and pulling things off a shelf

based on what's in that file

that's not scary at all I mean that's a

really simplified version with closure

is but that's basically what composer is

I'm gonna read a file and pull things

off a shelf based on what's in that file

and that shelf just happens to be the

internet for any of those to the

composer drudge you typically composer

help brush help yeah it gives you all

the commands

that's an awesome point this stuff was

all written by us B hat same thing for

behavioral driven testing backstop for

pixel to pixel differences they were all

written by people who embrace the

open-source ethos and they use tools

that literally taught them how to use

the tool from within the tool

the manual was there so they wrote a

manual and helped Docs within the tool

so excellent point man and it's not just

what I showed there are thousands maybe

millions more github is literally built

off the back of this github for all's

bells and whistles and wonderfulness is

an online implementation of a shareable

git repo that's what it's heart is and

what's the point of a git repo to share

and collaborate with code all of these

tools are somewhere on github somewhere

all right but that's a lot of typing

that's an awful lot of typing and that's

where Eli's has come in Alice's work out

of this idea that I can set up a profile

for myself as a user

so these globally true things and if I

type out the full address of open

applications /firefox a PP it will open

up Firefox for me or I can just type FF

and it will do the same thing because I

can write an alias for myself I can also

tell bash where stuff is located like

I've installed a new tool great bash

does not know what's there I set a path

for it and it sure does

so aliases aliases can do a lot of cool

things but it's basically when I type

does do this instead it can be a very

short string it can be a very very very

very very very long string there's

literally no limit how long your bash

aliases can be I've seen ridiculous ones

that take up full pages but they do

amazing things yeah does it score it got

well you would have both cover our type

of us with aliases yeah exactly exactly

I type SL probably about CL so I a

latest CL to see which is clear

I get Porsche origin/master I hate

tagging that haul-out GP om every time

it works and now I have to type o like

we W e that's how I check the weather

that just gets me that element to

underground across river so I can just

type in where I am and it tells me where

I am

paths I'm not gonna go into paths but

this is just again tell bash where that

tool is so when you say open it do that

thing

but aliases actually is a very short

section hey Isis enter the other world

of like well what's the real real power

here because sure this is great these

are all shortcuts basically everything

I've shown you can get you to doing the

problem of the aliases to some extent is

like when you try to use someone else's

computer unicameral is it there's the

actual command there's that problem and

that's simply what I'm talking about

bash and not seashell are one of the

other amazing shells in the world

because this is just an implementation

of an idea there are a lot of other

open-source implementations of this idea

that rarely happens but it is amazing

when it happens like LS should anyway la

should always be La oh that's that's my

point umm I'm not gonna talk about this

but this is how you invoke it if you're

doing since a tutorial later on your own

that'll be useful but now we get into

like the real power and I said earlier

like we're gonna talk about why bash

took off and why shell won and why we

use and what we think of as a shell

isn't sea shell c shell still exists the

k shell doesn't it still exists but we

don't use it the christian there are a

thousand other shells that people have

written but none of them took off even

born himself said sea shell is a more

elegant solution except for if i want to

script things because what he did is he

figured out the problem i forget in the

turn off stop my head the problem of i

want to feed output from one command as

the input of another command typing yeah

what you said piping piping if you got

the piping problem and it's impairing to

the way he wrote shell and why we wrote

bash that way to a show so that's

getting a little advanced but there's a

this is a shell script and its simplest

terms what am i pointing to things I got

got screenshots for this we started with

well there's a hashtag which means

there's a comment I'm gonna ignore this

thing except for the very first line on

the very first line I got his out order

again I'm sorry I keep trying to improve

the order of this and I keep messing it

up on myself the very first line says

hashtag bang also known as shebang I

don't think that's where we get the

whole shebang but that's literally

what's called shebang everything after

this shebang is gonna tell you how to

run this program bash and if it says Ben

bash it knows okay I'm gonna run this as

a bash cuz that's where bash is stored

it's been bashing okay I got that I got

I know what I'm doing that if it's just

a single hashtag by itself

I'm gonna ignore it after that so when I

said this is bashas magic comment no

it's not that's what that joke is and

for those of you who didn't get that

when you walked in you're just gonna

name a file Sh

doesn't matter what's in it just as long

as it starts with that uh chin again the

shebang at the top it's gonna know what

to do with it as long as you give the

permission to do that and this is where

a lot of people like start getting lost

like oh man she my it's hard and it is

the first time you encounter changed my

change access mode change access control

lists change file modes that's what it's

changed power modes

it's confusing it's like what on earth

am i doing there are like a billion ways

I could do this for those of you who are

brand-new there's no like I'm never in a

basket before and I don't know where to

start with this literally if you were on

strim on 775 and the name of your

scripts it just works

that says I owner and maker of this

thing have full edit access and I can do

anything those file ID there and well

choose everything else they can see this

file could read it this is a very safe

way to run files if you don't know what

you're doing this is pretty safe mode

standard safe mode there are safer ways

to do it you never want to pit like all

zeros you kind of lose access to that

file altogether seven seven seven says

anyone can rewrite this file and that's

dangerous as heck too but again this is

getting in the weeds if you're going

through this by yourself this gets gets

interesting we're starting around time

and I wanted to get to some Q&A then we

run this stuff it's really easy just dot

slash name the file and his runs

you can also create your own user Ben so

that tilde slash Ben start stuffing your

own commands in there that will work

globally so when I type them as through

this type listless lists

then I fix this I hope I fixed it

thank you you know what I'm like don't

stop you can also kill out anything

about control Z and you'll jump out of

it I'm gonna do this list this is

another app I wrote a little thing I

wrote what listless does is it goes and

looks at my live website and make sure

that I'm up to date and make sure that

my auto updater ran and it did so I'm up

to date I didn't have to do anything no

updates present WordPress yeah it's a

WordPress in my blog you can or thank

you ignore that but that's that's all it

is it's like that little file called

this list I don't need the SH in there

anymore because it's written been folder

knows what to do with it again don't

need to absorb all that today just know

that's possible so what can you do with

scripts everything basically again let's

go back to what we just were talking

about bash move files around to read

files it can open things

so Bosch go over to all of these

websites actually we grew up this is not

us trying to run earlier with listless

list however II wrote this I think it is

a bug in it right now

but it's something just doesn't in the

comments have comments the experience

got this list of sites that I maintain

and then run through one or timing do

the tech same thing I just showed give

me a list of all the plugins and themes

to make sure they're all updated and

that all it's as administrator I don't

want to spend any of my time going in

and clicking buttons but I do need a way

to very quickly see if it worked

so once a week I do this on Friday

afternoon just say hey whistles list

okay we're up to date good I don't do

anything and that's my entire update

process for all of my website rest

websites open all these no no it's

checks is your yeah but that is but for

my point of view that is my update

process week to week

like I don't worry about it I know the

Machine did it because the output the

test result will all I had to look at so

that was my update process look at the

test result opens websites and Firefox

trivial sure but this is literally how

we run the weekly demo on Wednesdays at

things you want to see the weekly demo

here it is this is just open source well

again the links are down in the bottom

uh website on Pantheon

I built the tool for you'd build as many

as you want to build for off of a CSV

cuz I had to do eating sites in a day

once for a class and this does all the

handoff as well to organizations and

individual users and some pretty complex

stuff that going around clicking the

dashboard each site will taking about

four and a half minutes to do it by

myself going through the dashboard at

time did this script run takes two and a

half minutes per site but I like to run

the script once and it does that times

as many sites as I have in CSV post

content and test it with B hat backstop

before I push it production a little

weird

I'll MIT so when I write my blog posts

are random all in markdown storm and

github and I tell my machine hey go grab

them from github

go throw them up on a dubs environment

may

sure that everything worked with b-hat

because I make tons of typos obviously

and if that all worked pushed to test

and then let's go make sure pixel to

pixel it's the same things and my config

break anywhere in that cycle and if that

all work let's go ahead and push it

alive I do that for content every time

and that's for my blog

like I have no readers I don't care but

this was fun to build

and also this saves me hours of my life

because I don't want typos on my blogs I

the only user of my blog that I care

about is me in the future so I can go

back and say where did it go sing

karaoke last year when I was in town

where did I eat last time I was here

what sessions were cool

hey I heard about this idea in a session

but I don't remember oh I don't remember

who said it or exactly how they phrased

it I know I'll jump to the directory

that I store all of these files and

locally and grep them for keywords and

see what comes up and I can search all

of my notes like that every time without

thinking about it

ultimately I want to update sites and

visual regression testing to make sure

they didn't break it maybe throw in some

white house tests or some B hat tests or

selenium or throw a test name out there

sometimes I want to do that

automatically every single time there's

an update available the scripts really

available for panthéon you're more

welcome to tear it apart and do anything

you want with it and it will do all of

these amazing things all right we're

getting to the homestretch here last 15

minutes 10 minutes one of the coolest

things about bash is that this is a

universal language everyone here

probably knows a little bash they're

probably people that don't but for I

really came in this room like I know a

little bash you might not have got

anything out of so far I asked this

question literally on February 2nd and

was overwhelmed with responses like 30

people immediately Gaiman replies turned

out

Bailey's already talked about um you

didn't the up key to do the last thing

he just did

yeah I hate typing so here's everything

I've just ran all day I guess I was in

that folder for a long time testing this

little script to funds from game already

and autocomplete so so clear as multiple

things clearing it with a better one

something really long-term insurance I

love that sound I really do but it will

autocomplete for you if it something

like very long string

I don't remember I'm at right now very

my WD I'm just in the home directory

um you know us change directory Calla

yeah Donna type was K clear change

directory k and then tab and it

auto-completed for me you have to take

whole things trollee control a oh this

saves me so much time because you'd like

take forever long you want to like oh I

could get back to the beginning line

control a I'm back to the beginning they

can change it although on well I want to

get the eggs trollee and if you know

Emacs you probably spell need this

lesson because that's how he networks

worst man search not gonna explain that

today you'll find out what irony or if

you don't know it that will change your

life

bastards Astrix the wild-card character

this is how that guy supposedly deleted

everything on his servers the RM minus

RF asterisks from a root directory and

it says everything turns out was a scam

but you shouldn't ever do that um but at

the same time I'm gonna do this live

script

[Music]

so change directory to my desktop Shh

desktop and LS oh man I got tongue

screenshot so I'm gonna RM minus RF s

screen and then huh and uh Ellis and I

got no screenshots yeah not me

screenshots IR use them for something

that's why I named it to something

useful or I don't need anymore that's

the power of it

tap pipe arrow keys pipe is how you pipe

something from one to the other so I

could do an LS like I did there I could

do an LS input master clear LS and pipe

it out to a file called a dear list dot

txt and now on my desktop there is

something called its cat

dear list there's I mean that's a

trivial example but instead of copy

pasting I just said hey put it directly

there it's like one extra step I can cut

out over process because I can just say

just put it there but I can also say do

this and that or run this and then put

the output from that in here there's a

zillion ways to think about this stuff

but type stuff's all helpful if you're

like I would like to a really awesome

bash profile that saves me a lot of pain

in trouble but I don't write it myself

guess what there's a lot of examples

isn't my favorite one that anyone's

pointed out if you even have a bash

profile right now they're like I could

use some updates on that go dig out

ideas my favorite one that anyone told

me and I had never heard of this before

CD - which is basically last channel

button it's the last thing you did so if

I am clear change directory to something

like

to receive private I can't I can't I

can't this anyway it's private

oh that's why this man come yeah there

we go slash gross so I'm at my scripts

folder oh I can see the - that's cool I

can get up there but I can also come

right back to there so I can start

jumping around directories with last

channel without having to type it saves

me let's not receive me like a paragraph

we're at the type in the last month and

then there's this this applied 106 that

I can't mention it for advanced people I

ask people inside a Pantheon like hey

what's the super advanced pro tips I

should know that I could share with

people they're like yeah Bosch strict

mode and I said best strict mode what's

that and then I went looked it up and if

you are new don't do this because this

will very common things that you're

learning when you learn Bosch won't work

with us this is the strictest mode this

will fail at any conceivable fail point

but you want that if your script is

running the kubernetes cluster that

keeps up with house and run websites

this is literally forced thing you can't

have a script inside of Pantheon that

doesn't have this at the top there's

also other things but I'll talk about

those resources but ultimately this

stuff's everywhere once you learn the

basics of bash you can drop into any

machine in the world and learn bat and

like just go for it don't be afraid of

it it's just it's there and literally

for everything else in the world

just search just search there's probably

somebody's written a fully detailed

step-by-step tutorial for anything you

could conceivably want to do with bash

there exist on the internet just ask the

internet I didn't reach the skin I use

the same gift when I teach bat get but

it's same principle I want to learn how

to do this thing through the command

line oh just tell me how to do it

there's I was talking about with the it

just tells you the docks up front

but here's the fun part of course this

all sounds overwhelming there's probably

a lot of applications for your work but

honestly the command-line is fun

people have been thrown out of

universities for wasting all of their

time all night on command-line games

that true stories like go look up

history Berkeley it's amazing

the game that they were playing called

zerk there's other names for it there's

other games like it there's a lot other

games like it the first computer games

ever played in my entire life for

text-based games

hack

you can command line Nutella hack if

it's up and running this is the other

thing with tell hack it's on a weird

port and it is uh not always great but

you can just go there from your from

your browser tab it's a lack tell ah

yeah so here it is if you do this

through the browser like here this is

not your machine there is nothing to

blow up here you can do any command you

can dream up you could try to RM RF

right here I wouldn't work it's not

built it's not built for that but I got

to say it's work okay and now I'm

playing the game called Zurich and

that's figure out what I'm doing and if

you like me missed or remember that game

I'm dating myself there yeah yeah I want

to quit yes yes

and again if you mess up it will just

tell you what you're doing wrong I'm

just gonna force to quit second close

there we go because I'm not on my

terminal cuz I always used the green

screen on the terminal anyway it's a

really fun thing and you can just run

through these commands and be like wow I

didn't know my computer to give you that

I know my computer do that I know my

computer could do that

tell hack is fun as heck you can plays

org which is a really fun game for free

you'll want Prime's they'll print prime

for ever you want to write type things

and very large awesome blocky characters

in the command line it's called piglet

it's awesome you want cow say here it

came from Star Wars like that will play

the Star Wars that I was talking about

earlier and thousands of other articles

three pillars of good bash so I said

bash strictmode

those are the other two things that we

use internally Pantheon shelf the Shelf

style guide Google shell style guide and

shell check which not going to get into

today if you're an advanced user just go

dig into those and it will literally

change the way your bash scripts look

and feel I don't use them for my

personal examples so if you look at the

batch examples they're not there but

again if you're learning this stuff it

actually gets in your way a little bit

and that's really all I had to say and I

took me like an hour to say it so

there's a partner suppose clap along

with these guys again I'm Dwayne I

didn't update this slide apparently 2k

the right feedback something's gonna

release this live scribble do live sure

about that everybody if I thought I'd

updated that and that's it

so for the rest of it I got Q&A but man

there's no way I'm an expert at bash

it's it's I'm not I know what I know and

I know it's shared if to do that right

there so instead of a Q&A where you're

asking me a bunch of questions I'm happy

to answer I'm trying too happy to try to

answer let's turn this into a

conversation where if anybody has any

bash tips that they want to share I know

somebody's gotta ditch in one like

woohoo you forgot this one or you didn't

say that that's let's get him out there

Doug gray see it first okay Jeremy what

here it is

command K okay that's clear for me

that's clear for you

yes he enters for me so command K clear

screen

beautiful beautifully to save everybody

on alias

bono he was next yeah it's another shell

sure okay so this is basically an

implementation of bash with all of like

the power features figured out and

turned on already and if you're an

advanced user you're probably gonna like

this better if you're not a power user

terminal the way I'm showing it here

Bash is vanilla it's everywhere if you

know bash inside now yeah this is

probably a good choice if you don't know

bash inside now learn bash first that's

my solid advice on that because you're

never gonna drop in to a random Linux

server that hasn't been updated in five

years and finds ish there's not

guaranteed a good control gain control a

alt arrows let you skip words so what

you say oh oh there you go we're

learning together all the tips we got

double bang freebies commands so let's

run a command real quick so I actually

ruined something oh you know what it yes

[Laughter]

no actually no it on a Mac it doesn't I

know you have to go to the oh you're

right there we go it's controller a +

ctrl K does exactly that I did not know

that I've literally learned that right

now in front of you we're looking at the

and change directory up to

and then say bang bang that's what

oh no it's bang bang for me I think it's

a bang oh because where I'm at is up to

levels yeah you're absolutely right

Stevie - eating no I don't dot no I

don't I don't have that alias what else

we got okay you have a whole bunch of

knowledge in this room obviously and not

all of its me

right we need to say overwrite another

command with like make your own rep yeah

did say yes say you did an eight is this

rep and there's a thing that Congress oh

yeah

that is a built-in mechanism because

grep can't be set as an alias cuz grep

already exists in the dictionary bash

has its own dictionary of like what

things mean and grep is one of those

special words like you can't like calc

if you have Towe consolidate calc means

let's try it yeah when you source it

it'll tell you the line number of your

passion

- underscore profile so I have an alias

for a bachelor sport profile is open my

bash profile tomorrow I keep he made a

shorten it but it don't

so alias grep let's do grow that's the

trend grip equals grow yes make a grip

are you up

Group R which is a rail ASAP so let's

save it and now we're PWD did you ever

get watch just ask yourself where we are

source - love that sound

so I switched it up no dangerous I

would've said something

Wow no okay it's a grep are did that so

I thought that that was reserved

namespace the answer is no it will not

save you from yourself so be careful

your aliases then I just learned that

real time I am there I honestly thought

because I can an alias calc if you if

you do that and then just on the new

erase it from your profile or something

then it will like every time you open a

new session and evaluates your profile

so if you do that Tennyson we do we

just get rid of that mind then open it

yeah

don't worry babe you're never going to

check this constantly okay I use this

you put something in there all the

system's full writing something nothing

to install and you may not realize it

before you buy all that way you can just

come back yeah apparently you can't

overwrite that I honestly was taken me

and Doug both learned something right

now so be careful the thing is this is

completely optimal this stuff is

completely optional completely

completely optional and the only reason

you'll probably ever make one of these

isn't because someone told you to make

one is because you got tired of typing

out like where's grabar if they do you

do

fifteen ah thank you thank you yeah

grep - capital R I am I got tired of

typing that and I need don't even

remember exactly what it does it just

like the output of that better than

regular girl recursive case insensitive

in the line number yep that's it that's

it

sensitive a new iesson City that Zelda

you you can bash install Zelda game

which is actually really fun I got tired

of typing Python so tech PI but these

are things like you'll you'll this will

be your experience with bash and you'll

probably never make one of these until

you are early using the other command

anyway so like that that's probably why

we've never encountered it is if I need

grew up native I just used grew up like

I don't need grep are I in unless I want

to run grow are so this prompts as

anybody done anything magical with the

problems and how is there oh yeah here

it is and there is a zillion things you

can do with it but it's PS 1 equals okay

and you can actually have a ps2 as well

so instead like a pen to it like let's

say you want to pen what branch you're

in

um yeah that's entirely possible

it's um but I don't remember how to do

that off top my head but it's possible

but you can yeah if there's a path for

it there's probably a way to do this the

source you know what I got an alias um

it's gonna be pretty kitty sounds like

eh you might even have that already

built into it or something I hate that

the set up though yeah that's not

reading I think it's safe I feel like

I've some servers that I used to go into

if it had a branch with a traditional up

there all right well I don't know I'm

talking about in that one only ps2 one

anyway but yeah that's what you do it's

you can rename your ps1 ps1 but you just

look again this is one of those millions

and things there's a thousand things you

can do with it

someone's written a brilliant tutorial

it's just out on the Internet yeah just

surgeon yeah but it's possible

and in some ways I could use the

parameters in other ways I could change

directory because it was doing it in a

different environment whenever

the only way I was able to do it was

ready to function yeah it seems worth

sup I thank you for that actually I

didn't talk about functions you'll run

in sometimes you're like I want to do an

alias but it's really complex you can

write scripts inside of your aliases

called functions I just personally have

the opinion if I'm gonna do that I'm

gonna go ahead and make a whole script

out of that because it's easier to for

me to track its the functions are good

I'm not saying they're not it's a

personal preference thing but we're out

of time thank you very much for your way

over