hash: Linux Commands HowTo
hash: Remember the full pathname of a name argument
Remember the full pathnames of commands specified as name arguments,
so they need not be searched for on subsequent invocations.
SYNTAX
hash [-r] [-p filename] [name]
OPTIONS
-r Reset (causes the shell to forget all remembered locations)
-p Use filename as the location of name (don?t search $PATH)
The commands are found by searching through the directories listed in $PATH.
If no arguments are given, information about remembered commands is printed.
The return status is zero unless a name is not found or an invalid option is
supplied.
This is a BOURNE shell command.
"I spent most of the eighties, most of my life, riding around in somebody
else?s car, in possession of, or ingested of, something illegal, on my way from
something illegal to something illegal with many illegal things happening all
around me" - Iggy Pop
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