I lost my rpm database (RH 7.1). (Don't ask me how that happened, because I will lie about it.)
Is there any simple program (a shell program, or maybe in Perl) to regenerate it?
updatedb doesn't work.

Is there any place on the web where I can find all previous versions that were ever made of any libraries/packages? Sometimes

Can different versions of the same library be installed side by side? Sometimes I need a certain version of a library to install some software. Some other software needs an older version. Of this other software there may not be any newer version yet that uses the newest version of the library. Can yum sort this out?

Janneman.

updatedb is probably the locate database for finding files quickly.
Try running