أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Commercial with Support Server RedHat Enterprise Linux (RHEL)
Non Commercial use as Server CentOS
If you like to cut down your linux distro, create a distro for a lot of flexibility use Debian
Highly user friendly desktop Ubuntu
http://distrowatch.com/dwres.php?resource=major can answer your question.
Scientific Linux.Its a valid distributor of Linux OS.
Centos - For more info please visit http://goo.gl/NcbKsf
And yes I approve and prefer GNU and Open Source