Mkdir– this command allows the user to creates new directory or folder.

cp– allow the user to copy content from one file to other.

 

mv– this command is used to either move file or rename a file.

rm–  allows the user to remove file as well as directory.

 

help– this command gives information about a command.

man– displays the command and gives a brief description.

whatis– gives the user a quick description and displays the command.

alias-allow the user to change to rename a command for personal perference.