Scripting

Shell Scripting

shebang

Shell	Shell is interactive between user and kernel where it takes command and pass it to kernel for execution and bring back the result to user. shell is required to communicate with kernel. Every shell has its own set of commands and syntax. There are some common commands on all shells ex. date. With of help of scripting you can create your own commands. Every command has a process ID (run #top) types: sh: Shell, Bash: Bourne again shell, ksh: korn shell, csh: c shell.
#cat/etc/shells	list all shell supported by sytem, defualt is bash shell (bourne again shell)type
#echo $shell	display default shell (/bin/bash)
#cat/etc/passwd \| grep username	display defualt shell used by a user
#ksh or #csh	switch to different shell and type exit to come back
She-Bang	#! it describe on which shell the script should run
parameter	which stores the value, ex. variable is a parameter which stores a value.
which cat	it will find whether cat command exist and which location which is define in PATH
echo $ PATH	shows paths, commands available in the given locations

code
code

Create Custom Command xxdate
- #vi azizdate (create a file)
- #! /bin/bash (defining She-Bang to run this script in bash)
- date (Action to perform) save and exit (:wq!)
- #chmod +x azizdateMake it executable and define path: Now created azizdate command will not run until you make it executable and define path in environment variable.
- #pwd to check location of this script and it will not run untill you define its location in path (cp azizdate "define one of the path"). Now run #azizdate it will execute.
Display name
- code
- code
- code
code
- code
- code
- code
code
- code
- code
- code
code
- code
- code
- code
code
- code
- code
- code

Yaml Scripting
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
IaC
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
Terraform
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
Python
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
6
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
7
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
8
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
9
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
10
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
- code
  - code
  - code
  - code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code
    
    code