Convert a full pathname to just a path
SYNTAX dirname PATHNAME DESCRIPTION Prints all but the final slash-delimited component of a string (presumably a filename). If PATHNAME is a single component, `dirname' prints `.' (meaning the current directory)
hash - Remember the full pathname of a name argument
ls - List information about File(s)
which - Show full path of commands
Equivalent Windows NT commands:
SET Parameters - get a full or partial pathname from a command line variable.