Why learn Shell commands ?

• Shell commands allows for faster execution of tasks, more flexibility, portability, consistency, debugging and better version control.

• It is a valuable skill for developers, especially those who work on the command line or in a CI/CD environment.

Let's start 🚀

The directory (folder) structure I am using in this demonstration is as shown below.

--> interests   
    |
    --> web-series
    |        -> breaking-bad.txt
    |        -> dark.txt
    |        -> wednesday.txt
    --> anime 
    |        -> naruto
    |        -> one-punch-man.txt
    |        -> .hidden-file
    --> movies
    |         --> fictional
    |           |     -> avengers-endgame.txt
    |           |     -> tenet.txt
    |         --> action
    |           |     -> rrr.txt
    |           |     -> black-adam.txt

If you want to follow along with the me, download the Shell Script code here: https://drive.google.com/file/d/1WBlP7DNVG3LIRQzsbRf6UNbLA8blu6QB/view?usp=sharing

# FOR THOSE WHO ARE FOLLOWING HANDS ON    

# check if the file is downloaded and code exists
# cat command is used to display the contents of the file
cat script.sh 
bash script.sh
cd ./interests
# you are now inside "interests" directory
# You are ready to continue with hands-on

cd

This command is used to navigate between the directories, back and forth.

Case 1: You are in "/interests" directory and you want to move inside "/anime"

# dot refers to current directory
cd ./anime
# now you are at: interests/anime

Case 2: You are in "/interest" directory and you want to move inside "/movies/action"

# going through multiple directories
cd ./movies/action
# now you are at: interests/movies/action

Case 3: You are in "/movies/action" directory and you want to move inside "/movies/fictional"

# you are at: interests/movies/action
cd ../
# now you are at: interests/movies 

cd ./movies/fictional
# you are at: interests/movies/fictional

ls

This command lists the content of the provided directory (along with the path). If no directory is specified, it defaults to current directory. Give '-a' as an option to see the hidden files, if any.

Case 1: You are inside "/interest" directory

ls 
# output: web-series anime movies

ls ./movies/fictional
# output: avengers-endgame.txt tenet.txt

Case 2: You are inside "/interest/anime" directory

ls -a
# output: .hidden-file  naruto  one-punch-man.txt

pwd

This commands shows the present working directory. Basically it shows the path from root directory to current directory.

Case 1: You are in "/interest/movies/action"

pwd
# output: /home/harsha/interests/movies

cd ../
# now you are at: /home/harsha/interests

touch

This command creates an empty file(s) with name(s) specified.

touch money-heist.txt
touch narcos.txt friends.txt
ls
# output: breaking-bad.txt  dark.txt  friends.txt  money-heist.txt  narcos.txt  wednesday.txt

mkdir

This command creates an empty directory.

Case 1: You are inside "interest/movies"

mkdir romance
ls
# output: action fictional romance

rm

This command deletes the file specified. Using -rf as an option, it deletes the directory specified.

Case 1: You are inside "interests/web-series"

rm money-heist.txt
ls
# output: breaking-bad.txt  dark.txt  friends.txt  narcos.txt  wednesday.txt

cd .. 
# now you are at: interests

rm -rf web-series
ls
# output: anime movies

Conclusion

Damn, you've reached this point 🥳👏. This shows that you are a keen learner🔥. Now do not stop here. There is much more to learn in Git.

If you want a short, sweet and a simple intro to the world of Git, do checkout: https://h4rsha.hashnode.dev/all-the-basics-you-need-to-start-working-with-git.

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