Use the cd (change directory) command to navigate through the Linux file system's directories. Use this command with a directory specification or pathname to move to a specified directory. This command is built in to each Linux shell, and can also be used as a shortcut to quickly move back to your home directory.
$ pwd /home/michael $ cd /usr/bin $ pwd /usr/bin $ cd /home/michael
If you enter the cd command by itself, you'll return to your home directory (specified in the $HOME environment variable). Move up to the next directory by entering two periods and a forward slash (../) with the cd command, like so:
$ pwd /home/michael $ cd ../ $ pwd /home
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