Environment Variables
Linux has lots of variables in your default environment. Variables in Linux start with a '$' and, by convention, they frequently use capital letters (but that is not required). You can also create variables in Linux to use later, which is a convenient trick that we will use. Try the following commands:
List all the variables currently in your environment:
env
Print the "HOME" variable to see what it contains:
echo $HOME
Notice that you have to use a $ for an existing variable!
What do you think the WORK variable contains?
Try this:
cd $WORK
pwd
cd $HOME
pwd
HOME and WORK are "convenience variables" because they are short, easy to remember, and faster than typing out the full directory structure.