Write the commands for given : a. To create a user U and add him to the group G in single command. b. To display all lines of a file not having the word Muscat or MUSCAT. c. To display 10th line of a...

Write the commands for given :

a. To create a user U and add him to the group G in single command.

b. To display all lines of a file not having the word Muscat or MUSCAT.

c. To display 10th line of a file, assume file is having 12 lines.

d. To remove all permissions to all users for a file F.