On 21/04/11 11:14, Frank Chang wrote: > > Good morning, I am trying to install binutils-devel on Centos Linux 5.5 so that we can obtain lib liberty required by the oprofile-0.9.6 Linux profiler. > Using root , I enter: yum local install binutils-devel-2.20.51.0.7-6.fc14.i686.rpm. Then I get the message: Public key for binutils-devel-2.20.51.0.7-6.fc14.i686.rpm is not installed. Please tell me where I get the Public key for binutils-devel-2.20.51.0.7-6.fc14.i686.rpm . Thank you. > > Why are you trying to install a Fedora 14 package on CentOS 5.5? Oh, it's probably because you're trying to install a later version of oprofile that again isn't a part of CentOS. The error you get is because, unsurprisingly, you don't have the GPG key installed for Fedora 14 on your CentOS system. This isn't a CentOS issue so you're on your own here. Good luck.