from your other posts you are using RHEL6
a not free OS. One that REQUIRES a paid for support contract
https://www.redhat.com/apps/store/desktop/
once you are registered then it is easy
Code:
su -
-- your root password when asked for ---
yum update
and that is it
if you are NOT going to buy the required license then do not use RHEL
you will basically NOT be able to install much
then install the FREE OS CentOS 6.2
or
ScientificLinux 6.2
both are free rebuilds of RHEL