Professional skills:
Platforms:
GNU Linux (advanced GENTOO linux skills, Debian, Ubuntu, some LFS), less practice with: RHEL, CentOS, FreeBSD, FreeNAS, by demand Windows XP/7.
More detailed system administrator skills list:
Redmine, RADIUS , VoIP Asterisk, IPTables, Oracle
VirtualBox, VMWare, XEN, iSCSI, NFS, FTP(vsftpd, proftpd,),
atftpd of pc-like and arm(currently raspberry pi and
hackberry on arm10) systems, remote indication of server state(cacti, Nagios), remote
access to graphical user workspace through RemoteDesktopProtocol(xrdp) and
TeamViewer, simple remote admining over console and X ssh, ssh2, telnet, nginx and
Apache(configureing includeing CGI scripts), had cute skills in system tools usage, such as crond(vixie-cron), lmsensors, and syslog(syslog-ng), ADVANCED level on kernel hand-configuring and recompilling in purpose of software and hardware update,
handling with remote repositories such as GIT and SVN, cloud computing
configureing(Apache OpenStack, Antrax).