Hi,
Bob Proulx wrote on 01/14/2015 06:25:
> Fredrik Jonson wrote:
>> Here's a small challenge. I'm trying to find obsolete or orphaned packages
>> on a system that's been dist-upgraded.
>> ...
>> How would you accomplish that assuming you cannot use aptitude?
>
> Try this:
>
> apt-show-versions | grep -v uptodate
>
<snip>
this doesn't show all the results "aptitude serach ~o" finds on my system (e.g.,
the package xlockmore). What the aptitude command does, I think, is comparing
the list of installed packages (as listed in the file /var/lib/dpkg/status)
against the list of known available packages (as listed in the files
/var/lib/apt/lists/*_Packages).
This shell command works for me:
awk '/^Package: / {print $2}' /var/lib/dpkg/status | sort |
(awk '/^Package: / {print $2}' /var/lib/apt/lists/*_Packages | sort |
comm -23 --nocheck-order /dev/fd/3 -) 3<&0
The "comm" command finds the packages only listed in the installed package list.
Regards,
jvp.
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