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.