> -----Original Message----- > From: fedora-list-bounces@xxxxxxxxxx > [mailto:fedora-list-bounces@xxxxxxxxxx] On Behalf Of Jeff Vian > Sent: Monday, July 25, 2005 6:27 PM > To: For users of Fedora Core releases > Subject: Re: How to Reverse a Yum Update > > On Sun, 2005-07-24 at 22:14 -0400, Sam Varshavchik wrote: > > Ping-Wu Zhang writes: > > > > > After a yum update, suppose something goes wrong and I want to > > > revert back to the state before the yum update, how do I > do that? > > > Thanks > > > > If you preserved the list of all the packages that yum updated, you > > can work backwords and derive from it a list of all the > packages that were removed. > > > > By default the list of updated packages is in /var/log/yum.log > >From there a list of updated packages is easy to see. > > > If you did not preserve a list, something like: > > > > rpm -q -a --queryformat '%{INSTALLTIME} > > %{NAME}-%{VERSION}-%{RELEASE}\n' | sort -n > > > > gives the list of all installed packages, sorted by > installation time. > > I suppose that on x86_64 you'll need to throw an %{ARCH} in > there, also. > > > > Examining the timestamps at the end of the list you should > be able to > > determine which batch of packages were installed recently. > > > > Then, you cross-reference that list of packages against the > contents > > of the installation disks and update channels, and come up with the > > list of packages that were removed. > > > > Then, you'll have to manually reinstall the older versions of each > > package, using the right combination of magic flags that > tell rpm to > > accept an "upgrade" to an older version of each package. > This is not > > an automatic process -- this is manual, tedious grunge work. > > > > > > -- > > fedora-list mailing list > > fedora-list@xxxxxxxxxx > > To unsubscribe: http://www.redhat.com/mailman/listinfo/fedora-list > > -- > fedora-list mailing list > fedora-list@xxxxxxxxxx > To unsubscribe: http://www.redhat.com/mailman/listinfo/fedora-list > > If you're not sure what has been updated check out /var/log/yum.log -Mike
