'which cd' prints nothing

[Michael]

In Ubuntu 12.04, enter the command 'which cd'. It prints nothing. Same with whatis and whereis:

$ whatis cd
cd: nothing appropriate.
$ whereis cd
cd:
$ which cd

Lame. It should print that cd is a bash builtin, or a function or alias or whatever.

Update:
This thread suggests using 'type -P' instead:
http://unix.stackexchange.com/questions/10525/how-to-use-which-on-an-aliased-command

While that is a solution, I don't think we should be satisfied with "which sucks, use something else instead"

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1097911/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.