Shell Scripting for DevOps|Shell Scripting Zero 2 Hero|Shell Scripting Interview Questions|

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www.buymeacoffee.com/abhishekprd Hi Everyone, Welcome back to my channel.
In this video, We will take a look at the Basics of Shell Scripting and learn how to become a Hero in Linux and Shell Scripting.
Learn why Shell Scripting is used in DevOps and most commonly asked Interview Questions.
0:00 - Introduction
01:30 - What is the purpose of scripting and automation?
05:25 - How to create a file ?
06:15 - How to list the files and folders ?
07:40 - man command in linux ?
10:50 - (vi/vim) - How to write a file in Linux?
13:00 - Difference between touch and vim?
15:17 - How to copy content in Linux?
15:25 - What is the purpose of #!/bin/bash or #!/bin/sh?
17:25 - What is the difference between ksh, bash and dash?
25:00 - How to use Insert command in Linux?
25:00 - echo command in Linux?
29:20 - How to execute a Shell Script?
31:00 - How to grant permissions in Linux?
32:00 - chmod command and how to use?
40:30 - How to check the history of commands?
41:30 - Revise all the commands that we learnt till now
45:30 - How to create folders?
46:00 - How to change the directory in linux?
49:00 - Learn how to write a simple shell script?
59:35 - What is purpose of Shell Scripting in DevOps?
1:06:22 - How to check CPU and RAM of a Linux Machine?
1:07:20 - What is "Top" command and why is it used?
1:08:50 - Conclusion of PART - 01
About me:
-----------------
LinkedIn: / abhishek-veeramalla-77...
GitHub: github.com/iam-veeramalla
Medium: / abhishekveeramalla-av
KZbin: / @abhishekveeramalla

[@Deva2596]

🎯 Key Takeaways for quick navigation: 00:00 📺 Introduction to Shell Scripting tutorial and its relevance to DevOps engineers. 02:21 🤖 Automation through shell scripting helps reduce manual tasks and streamline activities on Linux systems. 04:13 📜 Shell scripting is the process of automating day-to-day activities on Linux systems using script files. 05:32 📂 "touch" command creates files, essential for automation scripts. "ls" lists files, "-ltr" sorts by timestamp. 07:26 📚 Use "man" command to access the manual for any Linux command and understand its usage and options. 09:02 📋 Basic commands learned so far: "ls" for listing files, "touch" for file creation, "man" for accessing command manuals. 11:59 🔧 Use terminal tools like "Vim" or "VI" to create and edit shell script files. 15:01 📜 Start a shell script with a shebang ("#!") line specifying the interpreter, like "/bin/bash" for Bash scripting. 19:24 🔀 Choose the appropriate shell interpreter for your scripting needs, with Bash being a widely used option. 22:39 🚫 Be cautious of using "/bin/sh" in scripts, as system defaults might vary (e.g., "sh" pointing to "dash" in some systems). Prefer "/bin/bash" to ensure compatibility. 23:05 📄 Always use `/bin/bash` as the shebang in shell scripts to ensure compatibility, as some systems may use `dash` or other shells by default. 25:07 📝 In Linux, use the `echo` command to print text, analogous to using print statements in other programming languages. 26:47 📝 Vim is used to create and edit files in the command line. Entering "insert mode" allows you to type text, and pressing "esc" returns to command mode. 28:45 📂 The `cat` command prints the contents of a file without opening it, providing a quick way to view file contents. 29:54 ▶️ Execute a shell script using either `sh scriptname` or `./scriptname`. The latter is used for executable files. Make sure to set execute permissions using `chmod +x scriptname` if needed. 31:25 🔒 Linux requires proper permissions to execute files. Use `chmod` to assign read, write, and execute permissions for different user categories: user, group, and others. Numeric values like 777 or 444 represent these permissions. 35:09 ⚙️ `chmod` permissions follow the 4-2-1 convention: 4 for read, 2 for write, and 1 for execute. Use these values to grant permissions to different users. 37:25 🔍 The `history` command displays a list of previously executed commands, which can be helpful for referencing or repeating commands. 39:16 📂 `pwd` displays the present working directory, showing your current location in the file system. 42:10 📝 Use `mkdir` to create directories (folders), and navigate between directories using `cd`. `cd ..` moves up one directory level. 47:08 📂 PWD command for present working directory. 47:22 📁 MKDIR for creating directories. 47:37 📂 CD for changing directories. 48:20 📝 Writing a simple shell script for creating files and folders. 49:55 🗒️ Using comments in shell scripts with the "#" symbol. 50:10 💡 Shell script to create files and folders. 51:08 🔑 Using CHMOD for changing permissions. 53:43 ⚙️ Executing shell script and creating files and folders. 54:11 🌐 Shell scripting for automating DevOps tasks. 57:00 📊 Use case: Automated node health monitoring of virtual machines. 01:00:07 🧰 DevOps engineers use shell scripting for infrastructure and configuration management. 01:02:45 🔄 Use of "top" command to monitor processes and resources. 01:08:09 ⚡ Advanced topics in shell scripting, like trapping signals and cron jobs. Made with HARPA AI

[@dilly4747]

Thank you

[@SaiKiran-hj6qb]

Thank You 👍

[@ayyappans3133]

Can I have a advance shell scripting seriously you are awesome 👍 1hr sit and watched your video without any disturbance because way of explaining is great nice

[@meramvlogs4260]

I paid almost 2500 to one of the reputed website for learning Linux, but you are the best in teaching the topics. Thank you so much such wonderful content that too at free of cost. You must have BIG heart. Stay blessed Brother.

[@AbhishekVeeramalla]

You're very welcome!

[@tanajilahudkar]

really your great

[@sindhusinchu2958]

​@@AbhishekVeeramallahi sir

[@tejeshwararaothella8761]

Kodecloud?

[@tallurivamsi6413]

Your are a gem.Without expecting anything,you are educating lot of people like me and the best part is you are the part of our learning journey and career growth.The way you are explaining the things are very intresting.The best thing in anybody's life is they feel they are the reason for others growth,as of now you are doing the same thing.keep educating us and keep inspiring us.....

[@rutheirene7548]

Wow! Your content is awesome and you are a very good teacher that breaks down complex things into simple. You have done a great job. Thanks for posting this and for the expository. Interested in more of your tutorials.

[@AbhishekVeeramalla]

Glad it was helpful!

[@AndyO-cp9yi]

To be honest, you are a great teacher in, I admire your approach to teaching which makes it extremely simple to grasp even complex concepts. I have seen many devops videos online which do not come anywhere close to this material in terms of delivery and topics. More importantly, you created an extremely valuable content like this for free. Many thanks Abhishek, I am satisfied and willing to support your work!!!

[@AbhishekVeeramalla]

❤️❤️❤️

[@surbhisharma5333]

Thank you for making these videos. Your way of teaching is very crisp and clear!

[@bindusuggisetti1912]

Hi Abhishek, literally awesome you are. I just found that in this video you have even mentioned how to select a file simply by a double click, teaching in detailed way. Highly appreciate it.

[@kamthecloser7373]

Thanks for simplifying Bash Scripting into a more digestible lecture!

[@user-xi4ms3ek7j]

I have paid 7000 for devops course but, there is no detailed explanation of any topic but ,your videos are amazing for explaining each and every topic in DevOps I have learned a lot from ur videos. thanks for teaching us these precious concepts.

[@AbhishekVeeramalla]

Glad to hear that

[@jagruthireddy98]

The best video I have ever seen about Linux and Shell Scripting. Kudos to your amazing teaching👏👏👏👏

[@dirudeen1421]

I just wanted to extend a heartfelt thank you for taking the time to teach us Bash scripting. 🙏 Your patience, expertise, and clear explanations have made a complex subject much more approachable and enjoyable. 😊 We are truly grateful for the effort you put into helping us learn and grow. 🌱 Your guidance has been invaluable, and we appreciate everything you’ve done to support our learning journey. Thank you, Abhishe! 👏👏

[@AbhishekVeeramalla]

Glad it was helpful!

[@user-cb8pi7cv5n]

To the point and crisp content . Thanks a ton, a lot of my concepts got clear today. Cant wait to explore more from the channel.

[@AbhishekVeeramalla]

Most welcome!

[@rutujasalunke7807]

Hi Abhishek, Firstly, I want to express my gratitude for the incredible work you're doing to support learners like myself. I deeply regret discovering your channel after investing in an expensive BootCamp. Your videos have reignited my hope for learning and gaining knowledge. They motivate me to get back on track and dive into learning again. Your roadmap and day-by-day videos are beneficial and easy to comprehend. They teach us how to do things and why and when they are applicable, which is often lacking in many professors' teachings. I'm eager to continue learning from you and wish your channel immense success. The world needs more educators like you.

[@mrjacksparrow8942]

Very informative, kudos to you for making this video. It's very helpful for me. I've been searching for the best scripting videos on youtube since last week, and now I found yours. not even a minute was wasted worth watching it. Thank you for making this video.

[@AbhishekVeeramalla]

Thanks alot 🙏❤️

[@anil-kumar75]

Thanks for the quality content, Eagerly waiting for advanced concepts of shell script with realtime scenarios

[@govindmehra522]

Hi @abhishek veeramalla sir please create a video on advance topic in shell script

[@mullapudirajaram796]

My mother saw your pic at video in between😅... She asked who was he.. i told her you were my friend from Hyderabad who has been giving classes free for 2 years ago..😅you know what she believed me as well...

[@AbhishekVeeramalla]

Haha .. Thanks alot 🙏

[@DeviKumavath]

Same My mami saw his picture and asked if he works in your company 😅

[@abhishekgowda7383]

When I ever I visit your channel & do search for a devops topic,I will get the topics in laymen term,even people with no IT background can understand.Thank you bro.

[@AbhishekVeeramalla]

❤️❤️❤️

[@reyanshibirru4127]

Ur content is easy to understand and ur explanation is straight to the point . Learned so much from ur video's..and expecting more hands on as well...Thanks for posting....

[@AbhishekVeeramalla]

Sure Reyanshi, Thanks alot for the constant support.

[@vivekmittal2955]

One of the best video on shell scripting by one of the best seasoned teacher out here no filers direct to the topic and a remarkable ability to keep student interest in the topic hats off to you sir. thank you

[@AbhishekVeeramalla]

😤😤😤

[@user-kx4kr9fn8z]

Thank you Abhishek for the video and explaining the topics in very detailed manner. please continue with the advanced depth in Scripting.

[@ranineogadhikary5652]

Very well explained in such a simple way! Thank you Abhishek for your extraordinary work🙏

[@techotechs]

Mind-blowing Abhishek...Through this only one video, I have learned lots of things regarding Shell scripting...Since long, I am not able to find this type of video on youtube...Keep it up with some advance Tutorials for same...Love to watch it...Agin Thanks for making these type of videos...

[@devia7417]

Hey Abhishek, I watched this video today and its really very very useful ,you made it so easy to understand and the pace of learning. Thank you for sharing this knowledge with us and helping us to grow in our career.Truly appreciate it!!!

[@saikrishna12232]

Thanks a lot for spending your time and making this master piece. Appreciate it.

[@AbhishekVeeramalla]

Thanks alot

[@miideysimbi3318]

thank you so much, and we will appreciate the advance shell scripting concept. you're blessed

[@raeelhaider5414]

Hi Abhisheek. I am really grateful to you for your sincere efforts. I have never watched such useful content on linux in my whole career.

[@user-ub5sd8ot8m]

Hello Abhishek, Thank you very much for this amazing videos for shell scripting The way you are explaining is very interesting and getting a clear picture . Without expectation anything you are sharing your knowledge with others.

[@niharika9911]

Your explanation is too good. Can't wait to learn advanced concepts as well. Can you please make a video on that as well?

[@One_stop_Fitness]

Thanks for sharing tons of knowledge. I have even learnt some courses in edureka platform but i got clear understanding by watching your lectures. Abishek you are the best!

[@swetasoni148]

Hi Abhishek, you are doing a great job! you have explained everything in a simplest manner. Really grateful that i found your channel. Thank you :)

[@AbhishekVeeramalla]

So nice of you

[@sai_kumar_maladi]

Thanks brother, I came to comment to make part 2 , but you have already made them. you hvae good teaching skills. Appreciate all the work you are doing. Thanks

[@AbhishekVeeramalla]

Thanks alot .. Please share the channel with your friends and groups.

[@Cloud-DevOps_Aspirant]

The way of your teaching is excellent @abhishek hatsoff🙂

[@Govind-Singh9447]

Thankyou for this masterpiece❤️, waiting for another parts.

[@AbhishekVeeramalla]

Sure .. very very soon

[@udhayadeepab]

hi, you are aawesome Teacher. you explained the content without boring looking to learn more devops from you. thankyou

[@Sunil-ek3cw]

Very nice session waiting for second part with realtime use cases

[@AbhishekVeeramalla]

Will upload soon

[@manjeshsno596]

Really it was very much informative , please do the session on advanced shell scripting as well. Thank you so much Abhi.

[@Cloudnp9458]

To monitor node health. Cpu and ram.. nproc - cpu usage free - memory usage Top is for both.

[@rohitkamble6602]

Your way of explaining is very easy and easy to grab ... Very informative content 👍👍👌👌

[@AbhishekVeeramalla]

Glad you liked it

[@svnr1980]

Hi Abhishek, Your way of teaching is literally so simple and engaging. Please keep up the great work...❤

[@AbhishekVeeramalla]

😍

[@bcyrille]

I discovered accidentally this chanel but this serie is wonderfull. All topics are clear and well explained. Thank you very much for providing us such a good content. This serie is definetly my companion on my DevOps training journey 😊

[@AbhishekVeeramalla]

Glad you enjoy it!

[@SudheerKumar-qb3wl]

🎯 Key Takeaways for quick navigation: 00:15 📚 Shell scripting is about automating tasks in Linux, reducing manual work. 02:21 📄 Examples of tasks to automate include creating files and managing them. 05:05 🖥️ Use the `touch` command to create a file on a Linux machine. 07:11 🔍 Use the `ls` command to list files in a directory, and `ls -l` to list with timestamps. 08:34 ℹ️ You can access manual pages for commands by using `man` followed by the command name. 15:55 📝 A shell script typically starts with a shebang line, specifying the shell to use (e.g., `#!/bin/bash`). Choose `bash` for most cases. 22:39 ⚙️ When writing shell scripts, be aware that the default shell interpreter may vary between systems, which can affect script execution. Always use `#!/bin/bash` as the shebang line to specify the desired interpreter. 29:00 🔐 Linux requires setting file permissions for execution using the `chmod` command. Use `chmod +x filename.sh` to grant execute permission to a shell script. 43:10 📝 When editing a file in Linux using the Vim text editor, you need to enter insert mode to make changes. Press `Esc` and then `i` to start editing, and use `:wq` to save and exit or `:q` to exit without saving. 40:31 📚 The `history` command displays a list of previously executed commands in the terminal, making it useful for recalling and reusing commands. 44:48 📂 You can use the `pwd` command to check and display the current working directory (folder) you are in. It helps identify your location in the directory structure. 45:15 📁 To create a new directory (folder) in Linux, use the `mkdir` (make directory) command, followed by the desired folder name, like `mkdir foldername`. 45:58 🚪 To navigate between directories in Linux, use the `cd` (change directory) command followed by the directory name to enter a specific folder. 46:26 📂 PWD (Present Working Directory) is used to identify the current directory in Linux. 47:08 📂 You can create a directory with the `mkdir` command and switch directories using the `cd` command in Linux. 49:40 📜 Writing comments using `#` in shell scripts is essential for code clarity and understanding. 51:08 🗒️ Shell scripting can be used for automation, such as creating folders, files, and setting permissions, saving time in managing and monitoring large numbers of systems. 01:02:59 🔄 Monitoring node health in a DevOps environment can be automated using shell scripts to check CPU and RAM status on multiple machines. 01:05:03 📋 Shell scripting is a fundamental skill for DevOps engineers, helping automate various tasks such as infrastructure management, configuration management, and monitoring. Made with HARPA AI

[@AbhishekVeeramalla]

Thanks !!

[@anuj4269]

Hi Abhishek, This video is really helpful, I appreciate your time and efforts that goes into bring these videos live. I have a question though regarding executor command. As you mentioned bash ignores the statements that starts with '#', how does it identifies executor in the first statement though? and Does linux use different special characters to let the different executors identify comments ?

[@n4naveeen]

Thank you for this video. you make things very easy to understand! Looking forward to videos on Data science, AI, ML if possible.

[@AbhishekVeeramalla]

For now the channel is focused on Devops .. Thank you

[@foodiegirl6285]

i have zero interest in Devops, but ur content is inspiring me to become a Devops Engineer.. i ll update you once i crack the interview

[@sushmithakr4470]

Your content is very good, you are a very good teacher that breaks down complex things into simple, keep making such content. power to you✊

[@sindhusinchu2958]

Hi

[@AbhishekVeeramalla]

Thanks a lot!

[@Manish_Cyber_Expert]

Devta aadmi ho bhai...Superb Channel

[@hiteshhatwarbs1911]

Thank you for such an engaging and detailed video.

[@satyam1543]

very good tutorial for learning linux fundamentals and shell scripting

[@chandrasekaran4441]

Easy to undersatnd,Thanks ur valuable time for spending this.

[@vinayaka5144]

I thought that it is very much simple way of teaching shell scripting. Thank you!

[@AbhishekVeeramalla]

🙏

[@venkatallu5337]

Perfect video to start Shell learning !

[@AbhishekVeeramalla]

Glad you think so!

[@chandangowda6935]

Very much ease of understanding

[@pavansatishj8290]

It's a wonderful session sir, and easy to understand for begginers, please do more sessions.

[@AbhishekVeeramalla]

Glad that you liked it

[@gouthammahankali4464]

Thank you for sharing the good content which will help us to learn easily and we eagerly waiting for the advanced concepts of shell scripting with real time experience

[@ajitha6677]

Sir your teaching is very excellent for understanding 😊😊

[@vivekteega]

Thank you! Please do an advanced video on Shell Scripts too 🙏🏽

[@jerricavalentine3637]

Please create a video on advanced concepts of Linux for Devops. Thank you so much for your content!

[@TheCloudEngineer7]

Best video ever thanks sir,i need to become a devops like you

[@manojnetla1266]

Hey Abhishek... This was really helpful.. Please do the advanced concepts on shell scripting.. You're rocking!!!👍👍

[@user-il4kq3pv1k]

Dear Sir, I am extremely grateful to you. Your videos have been very helpful for me. Thank you very much.

[@nagababunalluri5059]

Firstly, I didn't have any confusion or ambiguity in between of the complete video while you are explaining. thanks

[@AbhishekVeeramalla]

🙏

[@ventureacc-gf7gf]

Thank you abhishek, you made my learning life heaven, and you always makes me more motivated..

[@AbhishekVeeramalla]

Glad to hear that

[@robotech2024]

Thank you so much for providing such a wonderful content regarding Linux Shell scripting for me like a Beginner. Please do advanced topics in the same. The way of explaining the concept is simple and easy to understand..

[@AbhishekVeeramalla]

please check the shell scripting playlist, there are more videos

[@pritip1546]

Hi Abhishek........ in very easy method u r explaining... Very useful... And i started Devops zero to hero journey..... thank you so much....

[@AbhishekVeeramalla]

All the best

[@rohanrustagi7857]

Your content is easy to digest thats why I always suggest your channel to my friends

[@AbhishekVeeramalla]

Thank you so.much ❤️

[@harita5074]

Teachers like u are rare 🙏 Your way of explaining each topic is highly commendable ❤Thank you so much 🙏 best part is revising the topic 😍🥰👌

[@AbhishekVeeramalla]

It's my pleasure

[@AmrutaWagh-kb3yv]

yes sir please make advanced concepts also thank you. As you complete the Q&A on shell scripting now we want implement advanced one.

[@manjunathbellakatti8278]

I am really very thankful to you sir 🙏 You explained the concepts in simple manner...

[@AbhishekVeeramalla]

It's my pleasure

[@dachuudachuu8022]

tqsm brother it helped me lot understand the concept in an easy way may God bless you.

[@abdulmohammed3805]

Thanks for explaining in a detailed manner.

[@AbhishekVeeramalla]

Most welcome !!

[@computertricks8474]

thank u so much sir. explaining everything very easily

[@ankitaB11]

The emerging devops star is here. Why didn't i find this channel earlier.

[@archanaakhotlande8301]

Hi Abhishek, Your content and way of teaching is excellent. Please do advanced shell scripting videos.. Thank you!

[@suryanarayananb9517]

Useful, especially your constant revision on the video helped. I noticed it was 2.20 AM while recording on your laptop, Effort..🔥

[@AbhishekVeeramalla]

🔥🔥🔥

[@Kavi1444]

thank you So much to make me understand shell Script in a very simple way ... 🙏🙏🙏🙏

[@lakshmitutorial3850]

Sir I never and ever see this type of explanation on shell script.i learn alot in this vedio. abishek garu tq sooo much.ur effort for us is speechless. Pls continue the vedios

[@AbhishekVeeramalla]

Thanks alot

[@marinenipavankumar7369]

Hi Abhishek, Thanks for making video on shell script, it is very easy to understand and can learn quickly. Thank you so much once again.

[@Vishwask22]

Revised some Linux cmds too, Thanks for creating this video. Now moving towards your advanced concept vdo Abhishek. Thanks.

[@AbhishekVeeramalla]

Most welcome!

[@user-ww9eh2nw2m]

Thank you for the Wonderful session one step forward to the DevOps journey.Thanks, Abhishek keep going 🤩

[@AbhishekVeeramalla]

Awesome

[@aniketgirigoud198]

Make complete tutorial on linux and shell scripting at basic to advance level , way of teaching is another level

[@ride_it_]

Worth of watching this play list 🤩

[@nokzeo2777]

great content. please do a clip on advanced concepts of shell scripting. that would be handy

[@babugowda1683]

Absolutely we need advanced topics Abhi, appreciate your work 😍

[@AbhishekVeeramalla]

Definitely

[@arundhathidanda7640]

Good content, please continue with advance concepts in shell scripting

[@AbhishekVeeramalla]

🙏

[@AyodeleOso]

I enjoy your class. Pls do an advanced video on the shell scripting, thank you.

[@raviyadav3408]

very good understandings with teaching👌👌

[@vikashkumargupta6691]

Chagaye Guru. Loved this

[@AbhishekVeeramalla]

🎉

[@KalpanaRadhakrishnan1999]

I am so happy abhishek veeramalla😊😊😊.... Thank you so much 🥰🥰🥰🥰🥰

[@AbhishekVeeramalla]

Welcome Kalpana

[@kinjaldhaduk8328]

wonderful content. Please make video on the advanced topics as well,. Thank you.

[@sohamkasar7218]

You r the alakh Pandey for engineering students 💯❤ thanks for sharing your knowledge with us really helpful 😊

[@AbhishekVeeramalla]

Means alot . thank you

[@krishnakumarkumar5710]

He is Devops wallah

[@missy2904]

Thank you so much for all your efforts 😊.you are amazing no words to express the gratitude ❤️

[@AbhishekVeeramalla]

Most welcome !!

[@debashismahapatra1377]

thanks, sir very easily understand your videos. It was very helpful to me.

[@AbhishekVeeramalla]

Glad to hear that

[@imran6465]

Your Content is awesome Abhishek

[@saironique192]

Excellent Abishek Appreciated Man Please go-ahead with advance concepts with real time usecases

[@AbhishekVeeramalla]

Sure

[@achantamanikanta3044]

Tons of thanks for your wonderful explanation

[@AbhishekVeeramalla]

You are welcome!

[@IJAZAhmed-ji7vj]

Superbb...teaching

[@user-pi7vu9po9i]

Excellent video Abhishek you are champ and clarified my doubts about shell scripts.

[@AbhishekVeeramalla]

😍

[@wwactive6659]

Great work!💐💐 Thanks a billion 🙏

[@AbhishekVeeramalla]

Welcome

[@saikiran-tt1ww]

Thanks a lot for this video, those real-time scenarios are very helpful, please do make more real time scenarios where do we use this shell scripting in devops role

[@AbhishekVeeramalla]

Sure

[@naveensankar856]

Abishek bro you are 💎. Thanks for this video and it helped me a lot .