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. In csh.1 you may specify a list of directories in which directory is to be sought as a subdirectory if it is not a subdirectory of the current directory; see the description of the cdpath variable in csh.1
Created by unroff & hp-tools. © somebody (See intro for details). All Rights Reserved. Last modified 11/5/97