how to install alpine on CentOS with Yum?

How do I update/refresh or add repos to Yum to install the alpine mail client? thufir@arrakis:~ $ thufir@arrakis:~ $ ll /etc/yum.repos.d/ total 20 -rw-r--r-- 1 root root 2139 Sep 28 2013 CentOS-Base.repo -rw-r--r-- 1 root root 718 May 31 2013 CentOS-Debuginfo.repo -rw-r--r-- 1 root root 630 May 31 2013 CentOS-Media.repo -rw-r--r-- 1 root root 3664 May 31 2013 CentOS-Vault.repo -rw-r--r-- 1 root root 293 May 31 2013 schmooze.repo thufir@arrakis:~ $ thufir@arrakis:~ $ cat /etc/redhat-release CentOS release 6.4 (Final) thufir@arrakis:~ $ thufir@arrakis:~ $ yum search alpine Loaded plugins: fastestmirror, refresh-packagekit Determining fastest mirrors * base: centos.eecs.wsu.edu * extras: mirror.spro.net * updates: mirror.hostduplex.com schmooze-commercial 171/171 Warning: No matches found for: alpine No Matches found thufir@arrakis:~ $