Most of my operation system experience were working on enterprise Unix system some kinds of SunOS, HP-Unix, AIX. Linux also the secondary OS which familiar with such as Redhat, Ubuntu, Suse, CentOS. All-purpose of maintenance and operate system 24/7.
In hardware part, I also have experience on various servers such as SUN, HP and IBM. For all over 7 years experience in IT system, I can be able to do a health check, recover, maintenance and also install a system.