CentOS

I messed up libz.so.1. Actually, I think I just moved it, renaming it libz.so.1.old as described here https://stackoverflow.com/questions/483 ... -not-found.

It did not work for me and now it will not boot. Trying to boot, the screen displays "...i8042 no controller found" (which is not an error/problem) then just stalls there. It never gets past this point.

Any suggestions for how I might fix this?

Boot a rescue media - like the install DVD in rescue mode - and mount your filesystems and rename it back.