used to delay for a fixed amount of time during the execution of any script

Return the specified number of lines from the top

a dialog-driven command in Linux used for creating and manipulating disk partition table / format disk

Allows you to check if two files are identical

Read the manual

Clear the terminal display

allows a user to gain disk usage information quickly

It searches for files and directories in a directory hierarchy based on a user given expression and can perform user-specified action on each matched file.

Add new user or change existing users data

Trace all the network hops to reach the destination

Get the active username

Search for a string within an output

Display file contents on the terminal