On Wed, Mar 28, 2018 at 09:31:11AM +0200, to...@tuxteam.de wrote: > On Wed, Mar 28, 2018 at 07:47:05AM +0900, Mark Fletcher wrote: > > [...] > > > I'm not sure if you really did what it sounds like you did here, but if > > you did... you can't mix and match commands to apt-get and aptitude. > > I think this is false, at least in such an unrestricted and > sweeping way. Apt (and apt-get, its younger cousin) and aptitude > are just front ends to dpkg and use the same data bases in > the background. > > In particular... > > > You did apt-get update so you need to use apt-get upgrade, or > > dist-upgrade, or whatever the apt-get command is > > ...apt update and apt-get update are equivalent (as most > probably aptitude update is). >
It wasn't apt and apt-get that were being compared though, it was aptitude and apt-get. And there _is_ some sort of difference between those two such that you have to update with the right one; I'm sure I've seen discussion of that on this forum before (I don't have links though). > > (I don't much use > > apt-get, have switched to the apt command since upgrading to stretch). > > Apt is just a friendlier front-end for apt-get: the command > outputs are not compatible (and you'll see a warning to that > effect in apt, aimed at those who want to use apt's output > in scripts), and aptitude has, AFAIK, some *extra* databases > to record user intention, and a different dependency resolver, > but the basic data sets (which packages are available, what > state each is in, etc.) are common. See above. The only person who mentioned apt was me, and even then only in the context of that's what I use nowadays. The OP never mentioned apt. In any case, those "extra databases" are probably a pretty good reason not to mix and match front-ends in quite the way the OP was doing, even if it doesn't immediately lead straight to trouble trying to get one's system updated properly in the way I suggested it might. > > > If you want to use aptitude upgrade, or dist-upgrade, or safe-upgrade, > > or whatever the command is (embarrassingly I have forgotten, I used > > aptitude for years _before_ upgrading to stretch) you need to first do > > aptitude update. > > > > apt-get update followed by aptitude upgrade will lead to pain. > > I don't think so: but I'm ready to be proven wrong! > Certainly I have no proof except my experience and my (patchy) memory that I have seen discussion of this point on this list before. Anyway the actual issue in this case turned out to be nothing to do with mixing and matching front-ends to dpkg. Glad the OP got his problem figured out. Mark
