[CentOS] Rebuild all currently installed RPMs?

>
> rpm -qa | while read p ; do yum <whatever> $p ; done
> rpm -qa | xargs yum <whatever>
>
> Replace <whatever> with whatever it takes to force yum to reinstall.
>
> Once you get it started, go have a good long nap:-)

It probably wont work, because there's  a ton of *-devel packages  
that need to be installed when rebuilding, which are probably not on  
the system right now.

If you always have your user home dirs on a seperate partition/disk,  
it's no big deal to reinstall. Just make sure you don't accidentally  
overwrite the user disk :-)

-- Morten