Where is "ps" command.

[Brendan J Simon <Brendan.Simon@ctam.com.au>]

I am using Debian Potato.  I installed a base 2.1 system from CD and
then did an "apt-get dist-upgrade".
The "ps" command is not available.  I thought it would be part of the
base system but it appears not.

What package do I need to install to get "ps" ?

How can I find out this kind of information ?
I tried "apt-cache search ps | grep util" and "apt-cache search util
| grep ps" but I could see anything.
Is there a better way ?

Please CC any replies to me as well as the list.

Thanks,
Brendan Simon.