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hash (Unix)

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From Wikipedia, the free encyclopedia

Standard UNIX utility

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hash
Developers	Variousopen-source andcommercial developers
Operating system	Unix,Unix-like,IBM i
Type	Command

hash is acommand onUnix andUnix-like operating systems that prints the location information for the commands found. Thehash command has also been ported to theIBM i operating system.^[1]

Syntax

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$ hash [name]

Description

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When the user gives a command, the shell searches for the command in the path specified in thePATH environmental variable and stores the location in the hash. This command can be used to search for the command given. The command is built into the shell.C shell implements this command in a different way.

Options

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The following options are supported.

name: Searches the PATH environmental variable for the name given

Exit Status

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This command returns the following exit values:

0: Successful completion

1: An Error occurred

Examples

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$ 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.

References

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^IBM."IBM System i Version 7.2 Programming Qshell"(PDF).IBM. Retrieved2020-09-05.

External links

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The WikibookGuide to Unix has a page on the topic of:Commands

hash – Shell and Utilities Reference,The Single UNIX Specification, Version 5 fromThe Open Group
hash(1) – Solaris 11.4 User Commands ReferenceManual

v t e Unix command-line interface programs andshell builtins
File system	cat chattr chmod chown chgrp cksum cmp cp dd du df file fuser ln ls mkdir mv pax pwd rm rmdir split tee touch type umask
Processes	at bg crontab fg kill nice ps time
User environment	env exit logname mesg talk tput uname who write
Text processing	awk basename comm csplit cut diff dirname ed ex fold head iconv join m4 more nl paste patch printf read sed sort strings tail tr troff uniq vi wc xargs
Shell builtins	alias cd echo test unset wait
Searching	find grep
Documentation	man
Software development	ar ctags lex make nm strip yacc
Miscellaneous	bc cal expr lp od sleep true and false
Categories Standard Unix programs Unix SUS2008 utilities List