It happens sometimes that your .rpm based Linux distribution is not working as expected. Linux boxes fails as well :), and after debugging, you find out that particular package ( let say abc.rmp ) is either corrupted/deleted from your system.
Below is one line step, how to install rpm package in rescue mode.
= boot machine to rescue mode
= find location, and how is CDrom recognized by system ( eg. /dev/hdc )
= mount CDrom to some temporary directory
# mkdir cdtepm
- mount /dev/hdc cdtemp
= Find a package you want to install, it is usually in “Server” directory in directory where you mount your CD
First execute it in test mode
# rpm -ivh –test –force –noscripts –root=/mnt/sysimage abc.rpm
if there are not errors generated, execute it for real, so remove –test
# rpm -ivh –force –noscripts –root=/mnt/sysimage abc.rpm
# man rpm
for more info about options above used.