command "tree" and "depmode" returnes in "unknowm" + verifing packages

[robert_wilhelm_land <robert_wilhelm_land@csi.com>]

The Debian2.2 system I recently installed does not accept the command
"tree" and "depmode".

I tried searching by:

MINI:~# dpkg -l modutils
Desired=Unknown/Install/Remove/Purge/Hold
|
Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err:
uppercase=bad)
||/ Name           Version        Description
+++-==============-==============-============================================
ii  modutils       2.3.11-8       Linux module utilities.

MINI:~# dpkg -l tree
Desired=Unknown/Install/Remove/Purge/Hold
|
Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err:
uppercase=bad)
||/ Name           Version        Description
+++-==============-==============-============================================
pn  tree           <none>         (no description available)
MINI:~# 

But how can a previuosly installed package be veryfied and how can one
find a certain routine (like "tree") out of all provided packages?


Any help is grately appreciated


Robert