[CentOS] Eeek, my centos6 box won't boot after broken update, need help w/ yum

Wed Feb 8 19:23:35 UTC 2012
Louis Lagendijk <louis at lagendijk.xs4all.nl>

On Wed, 2012-02-08 at 15:22 +0100, wwp wrote:
> Hello Ljubomir,
> 
> 
> On Wed, 08 Feb 2012 12:06:44 +0100 Ljubomir Ljubojevic <office at plnet.rs> wrote:
> 
> > On 02/08/2012 11:32 AM, wwp wrote:
> > > Hello there,
> > >
> > >
> > > I think I've shutdown my box right in the middle of a yum update.. The
> > > latest kernel installed won't simple boot, and the old one can, but
> > > only in init 3 mode (tty).
> > >
> > >  From a console, I wanted to complete the yum update and it suggested me
> > > to do a `yum-complete-transaction`.
> > >
> > > yum-complete-transaction tells me that 447 elements are left to run in 1
> > > transaction, runs and show lots of "Removing<packagename>  - ud from
> > > the transaction" then processes lots of stuff, and ends with listing
> > > lots of duplicate packages (mostly Xorg stuff) and.. and that's all.
> > > Same stuff if I start that command again.
> > >
> > > A `yum cleanup` doesn't change it.
> > >
> > > Any hint how I could get of that deadly loop?
> > >
> > 
> > "yum history list" will give you of last yum transaction (highest 
> > number). Use that number in:
> > 
> > "yum history undo <number>", "yum history redo <number>" or "yum history 
> > rollback <number>"
> > 
> > Read "man yum" for differences between commands if necessary.
> 
> Hm. Since I use CentOS (was using Fedora before) I discover some yum
> advanced features, thanks for teaching me, Ljubomir :-).

You may want to try the package-cleanup command. 
package-cleanup --problems could be the first thing to try

Louis