Hash command

[root@vikas ~]# whatis hash
hash (1p) - remember or report utility locations
hash [builtins] (1) - bash built-in commands, see bash(1)
Hash::Util (3pm) - A selection of general-utility hash subroutines
[root@vikas ~]#
[root@vikas ~]# hash
hits command
1 /bin/egrep
3 /usr/bin/whatis
2 /usr/bin/yum
2 /bin/ls
2 /usr/bin/clear
[root@vikas ~]#