User permission : Linux File Permission - javatpoint 

Practice

1. create file Give user read and execute permission group read and others read permission

2. create file give user read write execute permission group and others read permission

3. create a file give user read write permission group execute and others read permission using numbers

Types of Linux Editor

VIM

GNU

NANO

Save the file content

:w – Saves a file and keeps the file open

:q – Exits without saving

:wq – Saves a file and quits

vi Editor in UNIX - GeeksforGeeks 

bash shell

#!/bin/bash  == called shebang 

Korn shell

#!/bin/ksh 

Practice Script

1. Create a script to display 5 favorite quotes "Do your best and leave the Rest." 

2. Create a script to do the following task 

   1. make a directory 

   2. create a file 

   3.  write in the file "This is my first created using script"

   4. copy the file to new directory

3. Create a script to display  Myname is <value>. I stay in <value>

4. Create a script to add 2 number and display output "The sum <number1> and <number 2> is <SUM>

5. Create a script to display system information like - My system information is as below

uptime, date, present working directory, home directory, username.

6. Read Name and Favourite food from the user and display