I’ve seen alot of people get stumped by an error that looks like this, rar: /lib/libc.so.6: version `GLIBC_2.7′ not found (required by rar) even I did for a while, after numerous google searches I found nothing, however today I finally ran into the site that saved me!

Basically

rm -rf /usr/bin/rar
ln -s /usr/local/rar/rar_static /usr/bin/rar

For me the location varied a little because I extracted everything in a different spot!

http://www.123tweak.com/how-to-install-winrar-on-centos/