Bourne shell version. Search for
the directory in which each
command resides. Before a new shell program has been hashed, it can be
executed only from the directory in which it was created. Hashing a
command allows it to be run from any directory. (Hashing a command
adds it to a list of commands "known" to the shell.) Commands must also
be hashed if you change your PATH variable.
commands from the hash list, either all of them or just the specified
. With no arguments,
lists the current hashed
commands. The display shows
(the number of times the command
is called by the shell) and
(the level of work needed
to find the command).