14.6. Useful yum Variables

The following is a list of variables you can use for both yum commands and yum configuration files (i.e. /etc/yum.conf and .repo files).

$releasever: This is replaced with the package's version, as listed in distroverpkg. This defaults to the version of the redhat-release package.
$arch: This is replaced with your system's architecture, as listed by os.uname() in Python.
$basearch: This is replaced with your base architecture. For example, if $arch=i686 then $basearch=i386.
$YUM0-9: This is replaced with the value of the shell environment variable of the same name. If the shell environment variable does not exist, then the configuration file variable will not be replaced.