Bash Scripting on Linux (The Complete Guide) Class 02 - Hello World

Moore's Law of computing is very debatable nowadays, but one tech-related concept that's absolutely NOT debatable is that everyone learning any scripting or programming language should start with the classic "Hello World" example. And you know what? LearnLinuxTV is a sucker for tradition. So in this episode, you'll write your very own Hello World script in Bash!
Brand New Udemy Courses Available!
Check out my new courses on Udemy and take your learning even further!
• Ansible Course ➜ learnlinux.link/ansible
• Linux Essentials Course ➜ learnlinux.link/linux-essentials
Check out the Linux Shop
In the official shop, you'll find Shirts, hats, stickers, bags and more!
➜ merch.learnlinux.tv
5% discount on LPI exam vouchers
After you finish Jay's new course, get 5% off an LPI exam voucher here:
➜ learnlinux.link/lpi-voucher
Become a Patron
Show your support for Learn Linux TV on Patreon and get access to exclusive perks!
➜ learnlinux.link/patron
Become a Channel Member
Show your support for Learn Linux TV here on TH-cam and get access to exclusive perks!
➜ learnlinux.link/member
Mastering Ubuntu Server: 4th Edition
Jay's latest book covers everything you need to know in order to master Ubuntu Server. It's available here:
➜ ubuntuserverbook.com
Linux Gear and Kits
Check out Jay's choice of hardware products, audio/video equipment, and more.
➜ learnlinux.link/amazon
Grab an awesome Pi-powered KVM
Support Learn Linux TV and grab yourself a TinyPilot KVM here:
➜ learnlinux.link/tinypilot
Note: Royalties and/or commission is earned from each of the above links
Time Codes
00:00 - Intro
01:03 - What is a Shell in Linux?
05:03 - How to turn Linux command(s) into a Bash Script
06:40 - Marking a script file as executable with chmod
08:32 - How do you run/execute a Bash Script?
12:37 - How to (properly) write a Bash Script
OTHER BASH SCRIPTING SERIES EPISODES
- Class 01 ➜ Introduction: linux.video/bash1
- Class 02 ➜ Hello World: linux.video/bash2
- Class 03 ➜ Variables: linux.video/bash3
- Class 04 ➜ Math Functions: linux.video/bash4
- Class 05 ➜ If Statements: linux.video/bash5
- Class 06 ➜ Exit Codes: linux.video/bash6
- Class 07 ➜ While Loops: linux.video/bash7
- Class 08 ➜ Universal Update Script: linux.video/bash8
- Class 09 ➜ For Loops: linux.video/bash9
- Class 10 ➜ Where To Store Your Scripts: linux.video/bash10
- Class 11 ➜ Data Streams: linux.video/bash11
- Class 12 ➜ Functions: linux.video/bash12
- Class 13 ➜ Case Statements: linux.video/bash13
- Class 14 ➜ Scheduling Jobs (Part 1): linux.video/bash14
- Class 15 ➜ Scheduling Jobs (Part 2): linux.video/bash15
- Class 16 ➜ Arguments: linux.video/bash16
- Class 17 ➜ Building a Backup Script: linux.video/bash17
- Class 18 ➜ Closing: linux.video/bash18
Full Courses from Learn Linux TV
• Linux Essentials Certification Workshop ➜ learnlinux.link/lpi-course
• Linux Crash Course series ➜ linux.video/cc
• Learn how to use tmux ➜ linux.video/tmux
• Learn how to use vim ➜ linux.video/vim
• Bash Scripting Series ➜ linux.video/bash
• Proxmox VE Cluster Full Course ➜ linux.video/pve
• Learn Ansible ➜ linux.video/ansible
Learn Linux TV on the Web
• Main site ➜ www.learnlinux.tv
• Community ➜ community.learnlinux.tv
• Enterprise Linux Security Podcast ➜ enterpriselinuxsecurity.show
• The Homelab Show Podcast ➜ thehomelab.show
• Content Ethics ➜ www.learnlinux.tv/content-ethics
• Request Assistance ➜ www.learnlinux.tv/request-ass...
Disclaimer
Learn Linux TV provides technical content that will hopefully be helpful to you and teach you something new. However, this content is provided without any warranty (expressed or implied). Learn Linux TV is not responsible for any damages that may arise from any use of this content. The person viewing Learn Linux TV's content is expected to follow their best judgement and to make their best decisions while working with any related technology. Always make sure you have written permission before working with any infrastructure. Also, be sure that you're compliant with all company rules, change control procedures, and local laws.
#Linux #LinuxCourse #ITTraining

[@Capitaine.Albator]

I think that this is why TH-cam was created for. Thanks 👍🏻✌🏻🇨🇦

[@ojochegbe_]

Hi bro can we learn together

[@usuarioanonimo789]

​@@ojochegbe_no

[@skyedunphy]

@@usuarioanonimo789 well, sad

[@usuarioanonimo789]

@@skyedunphy just i be see that video, sorry for my inglés im learning

[@jimrakel418]

Thanks Jay! I spent a lot of time last week trying to find a good video series on bash scripting and today I finally did!

[@AjayKumar-ev9zi]

Thanks, Jay, for this wonderful course with a smooth start!

[@katofhyrule12]

Thank you! Before watching this video, I was able to complete my homework, but I did not UNDERSTAND it. I am now ready to move on to my next homework assignment. Thanks so much!

[@theena]

Thank you, Jay. This is super useful. Kinda genius to put the entire thing online at the same time too. Perfect chunks for a person like me. Thanks again.

[@marcuswest4572]

Terrific. Excellent visual presentation and clarity and good vibes in equal measure. Keep bashing out quality stuff Jay

[@rn9085]

This is just awesome. Perfectly explained.

[@user-zg3ix9sl9j]

You made this so simple! And how you explained it, bravo!!! Gracious!

[@AyalaStudios]

Hey Jay! I started watching your videos this past month and I can see the progress you've made from the uploads 4 years ago to the uploads today! Your way of explaining topics seems to have always been awesome - but your camera presence has definitely improved over the years! I just want to thank you for creating the content and show my appreciation. Your instruction is the the kind that many people can benefit from and I hope you continue to create amazing content!

[@temmy_rk]

Thank you Jay, this is awesome! you are a great tutor!

[@amaradoumbouya4119]

Thank you for sharing these full courses on TH-cam, there are better than all of paid course ❤❤

[@ivandelevic]

Very good video for beginners.

[@carrywhite4639]

Your videos make me excited about studying🙏 thank you so much❤

[@kannon_bach]

i just completed this video. i really like the way you do things. i'm really, really looking forward to learning this, python and C++!

[@ibrahimabdeltawab6418]

So informative! Thanks so much

[@pankajkarmakar7782]

Thanks Jay !! This is my first time to watch your video. Its really informative and helpful. Subscribed for more best content!!

[@demolazer]

I've just learned basic bash scripting and I can see this getting addictive. As soon as I do something in multiple commands I immediately think of building a script or .src function. First is mkcd to make and go into a directory. Then mkpyapp [packages] to make the common app structure I use, create a venv and install the rest of the arguments as packages in that venv. Finally open up folder in VS code. Then actscript to put bash script in ~/bin and make executable. Any many more in the pipeline...
It's so much fun! Look forward to learning more here

[@blackyonbi]

Many people complain about social media and what not, but i do thank you so much for using this amazing tool to share your knowledge.

[@hemantdhiman6179]

great jay!!! nice info in the first lecture!!!

[@kencreten7308]

I've used bash for years and years. This such a great course. Your presentation is - super pro, and enjoyable.

[@johnkevin1030]

Dont lie. If you have been using bash for years, theres no reason youll be here watching a hello world program

[@Opin10n]

@@johnkevin1030 Tbh, I've reached max ranked in a game and sometimes I still go and watch beginner tutorials and end up learning something I didn't know before. you'd be surprised. Plus its fun to reminisce back when I knew nothing and observe how far I've came

[@veronicarainin5045]

Excellent tutorial. Thank you

[@TheGrimPhreaker]

Thanks for the easy to follow lesson! Even if it's not very useful, I did try to make my own simple scripts to see how much I retained and it was fun!

[@Lightcode777]

Thank you so much for this course!!!!!

[@fabutrash]

Thank you very much. Great pacing and explanation.

[@richasinghal3611]

Good start!!

[@venkateshiyer5073]

absolutely amazing, thank you sir !

[@FririkurEllefsen]

Great lesson. Learned a lot

[@chesterbelle]

ty bro i really love how you teach, easy and simple, English its not my native language and im still able to do it ty

[@mahdikhalili5927]

its very good. thanks!

[@neverless_person1012]

Your explanations is great! Thank you! Also watched the video about permissions for files and directories. Now I don't scared of this magic letters "rwx" and digits!

[@mehdismaeili3743]

Excellent.

[@sureshabu]

Thanks a ton!

[@funkemonke9537]

Thank you so much man.

[@barkhadibraahim1023]

thanks so much

[@danielnadar75]

Jay! You are so awesome ❤ Thanks for sharing your invaluable Linux knowledge and Love with all of us!

[@catreunion]

Thank you teacher 🙏🏻

[@thaidoan868]

Thank you

[@wifii_millionaire_]

very super cours i simply understand bash script

[@abelashenafi6291]

Thanks a lot bro.

[@jojobobbubble5688]

I might recommend this course to my Boss. We manage Macs with an MDM and this would be handy for both of us

[@zamolxezamolxe8131]

Brilliant! Too bad my professors in the uni did not have such a way to teach things like you do!

[@BeltrameJuan]

Thank you!

[@samiramir91samor78]

Great Work :)

[@VideosRichy]

thank you!!

[@bikabrown6808]

Thanks 😊

[@13thravenpurple94]

Great video THank you

[@YannMetalhead]

Good video!

[@safiullahnoori2659]

We need more training and tutorial thanks you guide and teaching.

[@Bugzbunni_]

good videos my dude

[@isrargaming2849]

Its awesome clear

[@idan4848]

thank you very much!!!!

[@oseaniic]

Thanks!

[@kainaatmakhani6550]

informative lecture

[@jocelynmedina906]

Thanks

[@adamekhobba2156]

YOUR ARE GREAT

[@leonel_carrizo]

thanks!

[@simonkalu]

Awesome

[@12Q46HPRN]

Great video! I am looking forward to watching the rest of the series.
Any thoughts on: #!/bin/bash vs #!/usr/bin/env bash ? I see them both and was wondering if one is "better" than the other to use.

[@venkateshiyer5073]

same doubt, is there a difference between the two that i should know?

[@sussusamogus7831]

thanks :)

[@user-hb8ex6gu2t]

🥰🥰thanks sir

[@hassam1117]

Hi jay . Thank you for vim training and I learn a lot . Now starting script training and thank for all your time and training.
Mr. Jay I am not sure why you use nano for training script. I was expecting to use vim. I am sure you know better or may be nano is better to writ script. Thank you again.

[@haltutor8014]

thanks for this short course. confused: which bash shows /usr/bin/bash, but the she-bang says /bin/bash. why the difference?

[@cavenmasetla8740]

This is so beautiful but I'm so intimidated by the IF statements. I have goosebums☹☹☹☹

[@Royaleah]

Is it just me? I always put 'exit 0' at the end of my scripts. Even if I don't have other exit values else where in the script.

[@jimmyrichards5595]

Same here.

[@Sashin9000]

I like your gnome shirt

[@tinacole1450]

I simple used chsh -s /bin/bash and restarted to change. Later I changed it back to zsh

[@marble_wraith]

What about POSIX compliance? Wouldn't it be better to go that route instead for compatibility? That being the case, why not code for dash instead of bash? The resulting script should be executable in dash, bash and zsh (with compatibility mode).

[@ashisharya65]

HI Jay,
Could you please share what is the font that you are using on your terminal.

[@csharpner]

The "Jay Challenge". Make an entire video without saying the word "Well". Go! ;)
Great videos, BTW!

[@kushal836]

loved it sir thankyou for posting this content still watching and learning from it !!!!

[@Houndwar]

Hey jay @learn linuxtv how can u change ur terminal to have those colors.. can u do a vid showing us how to manage our terminal appearance, I am aware that u said u have a variation but I'm sure we can change colors and stuff..

[@fictitiousnightmares]

8:48 I'm curious why when it showed the contents of the directory it doesn't color the folders and such like it did when you just typed ls? Not nearly as useful as a script.

[@user-py7vj6dv4j]

is learning bash script have afuture and get jobs in devops or aws engineer?

[@ClevelandEscape]

For some reason mine isnt changing colors in terminal when i run nano

[@guilherme5094]

👍

[@JackHammaH9000]

hey, i switched to bash, it was on zsh on kali; now when i type commands like sudo, ls they don't "change color" the command works but they don't change, anyone having the same "problem" ?
thx

[@user-rc1jg2rf3h]

how do you install that on windows
i mean that interpreter looks clean

[@g-jalil6961]

😊

[@manojkumar-jt3fw]

Please suggest me a Bash Scripting Reference textbook please

[@cagataytekin6372]

buyuksun hoca

[@franciscoromogaray3076]

banger

[@yusufalfatih8276]

How you made the like button shining ?🤔

[@luciengrondin5802]

There is no need to search for bash with `which` in order to execute it. In case your default shell is not bash, and assuming bash is installed, it should be in the PATH so you can just type `bash`, or even `exec bash` to replace the current shell.

[@user-lu2hu4cc5h]

my linux vm still says zsh. any solution?

[@syedanas2823]

is it okay to use kali for bash scripting cause mine directory is /zsh

[@rickgrimes47]

yeah it's fine, I also use kali.

[@rickgrimes47]

did you dual boot it?

[@syedanas2823]

@@rickgrimes47 no been doing it in virtual mach

[@Alpha_Sadigh]

☯🙏

[@craigozancin]

Why are you using sudo chmod for a file you own. The use of sudo is only needed if you do not own the file.

[@TheGacko]

yes was going to say -- no need to sudo chmod files in your own home folder.

[@HadToChangeMyName_YoutubeSucks]

lol...was looking to see if anyone else noticed

[@Abdirahmaann]

Kkkk

[@Ollital]

I'm wondering who first came up with the name "shebang" 🙂

[@soupmachine5831]

first

[@anonim11366]

I think you need to talk less and teach more

[@cryptovadkan7496]

# echo $SHELL /usr/bin/zsh
Can I take this course even though there's a zsh instead of bash on my system?

[@ineme-awajiogwuafi5138]

thank you very much

[@patrob3885]

Thank you