Question

Linux

13. Use the command: set | less. What does the set command do?

14. What is the purpose of the variables: PS1, HOME, PWD, PATH?

15. Use the command: echo $PS1. Why did you have to use the dollar sign with the variable name? What did it do?

16. Use the command: PS1="This is my new prompt: #". What did it do?

Answer 1

Ans.

13. less command is used to view files instead of opening the file. Set or unset values of shell options and positional parameters. Change the value of shell attributes and positional parameters, or display the names and values of shell variables.

14.

PS1: The value of this parameter is expanded and used as the primary prompt string.

HOME: To used to find the or lookup user information regardless of whether that information is stored in local files.

PWD: Displays your current location in file system

PATH: PATH is a environmental variable that tells the shell which directories to search for executable files in response to commands issued by a user.

15. If you use echo $PS1 that display variable value the contain the some of data and if you use only echo PS1 without using $ sign then disply PS1 as a print on display. please fine below output.

16. PS1="This is my new prompt: #" command for open new prompt as below: