Building Pen from source on CentOS Linux - UlricE/pen GitHub Wiki
CentOS 7.0
N.B: Red Hat/CentOS keeps up pretty well with releases, so there may usually be no reason to build from source. At the time of writing, this is the most recent release:
[root@centos ~]# yum info pen|grep Version
Version : 0.25.1
However, here's how one would go about it:
yum install gcc
tar zxfv pen-0.26.1.tar.gz
cd pen-0.26.1
./configure
make
Testing:
[root@centos penloadbalancer-code]# ./pen -dfU 53 8.8.8.8:53
And from another host:
ulric@qvp2:~$ dig @centos +short siag.nu
194.9.95.65