Shell Scripting for devops Engineer

Hey, guys Today we are going to learn something about shell Scripting.

What is Shell scripting?

• Shell scripting is a kind of collection set of commands or stuff that can do some work or operations.

• There are some types of Shell Scripting are as follows.

  • first is bash

  • second is c shell

  • third z shell

• Every Shell Script has its production kind of things

  • example:- #!/bin/bash, #!/bin/sh etc.

• You can save your shell script with .sh.

• After that, you have to change the permissions to execute the shell script because it is read and write by default.

• You can execute a shell script ./script_name.

Some amazing stuff about shell scripting are as follows.

• You can make any reference variable without giving any data type.

• You can use $ sign for printing any stuff that was contained in the reference variable.

• You can take input as well by just writing a { read variable_name}.

• You can take the argument as well by just writing $1 so it will take only one argument.

  • example:- echo " welcome $1"

    While you execute ./script_name shubham

    output:- welcome shubham

• For taking all arguments or whatever you would write after your script name {./script_name 'here you can write your argument'} you can use $@

  • echo " welcome $@"

    While you execute ./script_name shubham classes

    output:-welcome shubham classes.

• We also can use conditional statements by the use of if and else

• We also can use loops.

• we also use Shell Scripting for backups because teh #DevDps engineer has to do it many times.

• You can use Shell Scripting for executing many commands at a time.

So, yah that It for the day. I will come again with another exciting topic in DevOps.