Basic Shell scripting commands

Creating a .sh file

Giving execute permission using chmod 777 <filename>

777 represent read write and execute.

Adding #!/bin/bash in .sh file as the beginning of a script or executable file , we can also use #!/bin/sh which selects the default system shell.

running the script using ./<filename>

echo: echo is used to display the string on the console.

variable: define a variable using = operator without any spaces.

eg: name="Bharat"

sleep: used to hold the execution for the defined number of seconds.

argument: arguments passed from the console are used using $ followed by its count.

if else :

general syntax :

if [ "parameter1" condition "parameter2" ]

then

statement

else

statement

fi