cd..
will back the directory up by one.
If you want to reach a folder in the parent directory, you can do something like
cd ../foldername.
You can use the ".." trick as many times as you want to back up through multiple parent directories. For example,
cd ../../Applications
would take you to Macintosh HD/Applications
cd
If you type cd and press the Return key—with no directory specified—you’ll go back to your Home folder. (You can also type cd ~ to go there.)
If you type
cd /
you’ll go to the root level of your startup disk.
If you type
cd ..
(that’s two periods), you’ll go to the directory above the one you’re currently in.
So if you’re in your home folder, and type cd .., you’ll go to your Mac’s /Users folder.
And if you type
cd -
(hyphen) you’ll go back to the directory you were in before the last time you issued the cd command.
