CD(1) Commands and Applications CD(1)
cd - change working directory (gsh builtin)
cd [ directory ]
directory becomes the new working directory. If cd is used without arguments, it returns you to your $HOME directory. Because a new process is created to execute each command, cd would be ineffective if it were written as a normal command. It is therefore recognized and executed by the shells.
pwd(1) GNO 31 August 1996 CD(1)