What does "is hashed" mean when using the type command? I was reading this post and trying out all of the commands in the first answer... I don't really have anything else better to do right now. Anyways, I ran through them all in regards to `rm`. What piqued my interest is this: root@headdesk:~# type ls ls is /bin/ls root@headdesk:~# hash ls root@headdesk:~# type ls ls is hashed (/bin/ls) root@headdesk:~# Running `help/man hash` is not very helpful, and `help type` isn't really either (it does not mention `hash` anywhere). Since I can't seem to find a relation in the man/info/help pages unless I am missing something, could someone please explain what `hash`ing is doing in regards to the `type` command?

In bash: just type `help hash` and you will get a help about the built-in command `hash`.

> Determine and remember the full pathname of each command NAME.

What that means is that after finding the location of a command the first time (or when hash is invoked), its location is remembered (hashed).