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hash (Unix)

From Quire, the open reference·Standard UNIX utility·1 min read
hash
DevelopersVarious open-source and commercial developers
Operating systemUnix, Unix-like, IBM i
TypeCommand

hash is a command on Unix and Unix-like operating systems that prints the location information for the commands found. The hash command has also been ported to the IBM i operating system.[1]

Syntax#edit

$ hash [name]

Description#edit

When the user gives a command, the shell searches for the command in a list of locations specified by the PATH environmental variable. To avoid this work in future, when a command is found its location is stored in a hash table which is consulted before the search. The hash command is used to display or manipulate that hash table, particularly to replace obsolete entries in the rare but possible case that a command is added to the PATH. The hash command is built into the shell. The C shell implements this command in a different way.

Options#edit

The following options are supported.

name
Searches the PATH environmental variable for the name given

Exit Status#edit

This command returns the following exit values:

0
Successful completion
1
An Error occurred

Examples#edit

$ hash

Print the hash table.

$ hash cat

Searches for command cat in the path specified by PATH environmental variable; if found, adds it to the hash.

See also#edit

References#edit

  1. ^ IBM. "IBM System i Version 7.2 Programming Qshell" (PDF). IBM. Retrieved 2020-09-05.
Categories Unix SUS2008 utilitiesIBM i Qshell commands

This article is mirrored from “Hash (Unix)” on English Wikipedia, revision 1358417107, written by Wikipedia's contributors and licensed CC BY-SA 4.0. Editing it here creates a Quire copy with its own history.

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