On 2013-11-07 17:38 +0100, Bob Proulx wrote:
> Florian Lindner wrote:
>> root@xxx:~# aptitude full-upgrade
>> No packages will be installed, upgraded, or removed.
>> but apt-get
>> root@xxx:~# apt-get dist-upgrade
>> The following packages will be REMOVED:
>> upstart
>> The following NEW packages will be installed:
>> e2fsprogs libss2 sysvinit
>> 0 upgraded, 3 newly installed, 1 to remove and 0 not upgraded.
>> Why do aptitude and apt-get give different answers?
>
> The results will often be different because the resolution algorithms
> in the two different programs are different from each other. This is
> why at different times in history Debian has officially recommended
> one or the other. They have not been completely interchangeable with
> each other.
Here the difference is that "apt-get dist-upgrade" insists on pulling in
any removed essential packages, while "aptitude full-upgrade" leaves
those alone. Both approaches have their disadvantages, although I
consider aptitude's behavior the lesser evil.
Cheers,
Sven
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