Linux/Virtualization) - Configuration of Linux servers including RedHat, CentOS, Ubuntu, SuSE distribution, monitoring tools(rrdtool, mrtg, nagios, snmp, cacti, munin), VPNs(OpenVPN, n2n VPN, PPTP), mail(sendmail,imap, pop3), DNS(bind), web server(apache+php), firewall(iptables,fail2ban), etc. - Virtualization platform(Citrix Xen Server, Vmware vSphere/ESX) install, configuration, physical to virtual(P2V). Amazon EC2/S3 configuration. - Scripting with PHP, Python, BASH, Perl