I did a general "yum update" on my Fedora Core 2 on a Toshbia
Satellite Pro 6100.  It downloaded everything (703 updates) and then
started installing all the new stuff.  It got to number 78
(postresql-server) and then it hung, requiring a reboot.

I can reboot and try again but now I have no idea what state my system
is in.

How can I roll everything back to the state it was in before I did
yum?

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