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cd [dir ]
cd [-LP ] [dir ]
cd [-LP ] [- ]
cd [-LP ] [old new ]

With no arguments, change to home directory of user. Otherwise, change working directory to dir . If dir is a relative pathname but is not in the current directory, the CDPATH variable is searched. The last three command forms are specific to the Korn shell, where - stands for the previous directory. The fourth syntax modifies the current directory name by replacing string old with new and then switches to the resulting directory.



Use the logical path (what the user typed, including any symbolic links) for cd .. and the value of PWD. This is the default.


Use the actual filesystem physical path for cd .. and the value of PWD.


$ pwd

$ cd cron uucp

	cd prints the new directory


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