FreeKB - Linux Commands hash command
Linux Commands - hash command

The hash command stores the path to commands that have been run in cache. If the hash table is empty, the following will be returned.

~]# hash
hash: hash table empty


Let's invoke a command,whoami.

~]# whoami


Now the hash command shows the absolute path to the whoami command.

~]# hash
hits    command
   1    /usr/bin/whoami


The -r flag can be used to empty the hash cache.

~]# hash -r


Or the -d option followed by a command can be used to remove a single command from the hash table.

~]# hash -d whoami


Now the hash table is empty again.

~]# hash
hash: hash table empty


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