The whoami command.
Exactly what the name says: It displays and sets the date on a Linux system.
In Linux, command typed at a command prompt displays a list of commands that would likely contain the command you desire. For example, to find all of the commands that have word flush in their name or descriptions type the following: man -k flush
Screen Tip
date -u +%A
nslookup if it was a linux machine nslookup works too, but dig -x on a linux machine will get more info for you
At a terminal prompt: sudo apt-get install <application-name>
Gallery
To get a list of every driver your system is using (except those that are compiled into the Linux kernel) type lsmod at the command line.
yum remove -y (specific package name)
whereis [name of program]
command box
There are many ways to do this: whoami id echo $USER echo $LOGNAME