dpkg also lists packages that are not installed (2.6.21 is listed below
because I just now installed it):
$> dpkg -l linux-image-2.6.*
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 linux-image-2.6.15- <none> (no description available)