The cd command has lots of fun little shortcuts. One I use frequently is the -. The ~ always takes you to your home directory, but using cd – will take you to the last directory you were in. For example, if you do the following on a Mac:
Then you do .. (which is a shortcut for the directory above the one you’re in):
Then pwd will show that you’re in /Users. But, if you cd to – again:
Now you’re back in your home folder. The – expands to OLDPWD. Quick tip. Nothing more to see here.