Mac OS X Panther in a Nutshell, 2nd Edition

Name

hash

Synopsis

                     hash [options] [commands]

Search for commands and remember the directory in which each command resides. Hashing causes the shell to remember the association between a name and the absolute pathname of an executable, so that future executions don’t require a search of PATH. With no arguments or only -l, hash lists the current hashed commands. The display shows hits (the number of times the command is called by the shell) and command (the full pathname).

Options

-d

Forget the remembered location of each specified command.

-l

Display the output in a format that can be reused as input.

-p filename

Assume filename is the full path to the command and don’t do a path search.

-r

Forget the locations of all remembered commands.

-t

Print the full pathname for each command. With more than one command, print the command before each full path.