Hello there,
I have quite extensive experience with linux systems/servers. I've been working for more than 6 years for different web hosting companies and now I'm working as a Senior Linux Engineer/Administrator.
I'm familiar with all major linux distribution but I've been working in special with CentOS (all versions), Debian (all versions) and Ubuntu (all versions).
If you have questions, please let me know.
Regards,
Bogdan Stoica