Programming/Scripting

• PHP
• Perl
• bash
• Javascript
• AJAX
• XML
• RSS
• Tc/Tk

VoIP

• Astrerisk
• FreePBX
• PHPAGI

Databases development and Support

• MySQL
• PostgreSQL
• Oracle - beginner
• CouchDB - beginner

Operation Systems installation and support

• Microsoft Windows
• Linux server administration- CentOS, SuSe, Debian
• Linux Desktops- VectorLinux, VS Live

Linux Administration/Maintainance

• Mails - qmail, sendmail, qpopper, dovecot, courier
• Traffic - Nagios, Munin, Cacti, MRTG, Smokeping, tc shapers
• WEB servers - apache, lighthttp, cherokee, nginx
• DNS - BIND, tinydns
• FTP - vsftp
• Control Panels - LXadmin, Kloxo
• Streaming servers - Adobe Streaming Server with server-side scripting, Darwin streaming server, Apple http streaming, Wowza
• DRDB
• Heartbeat
• SVN/Subversion
• Proxy/Squid

System monitoring tools

• Cacti
• Nagios
• Munin
• Cricket
• Angel Monitor
• AWstats

WEB systems customization and support

• Coppermine Gallery
• OS commerce
• WordPress
• BBClone
• phpBB
• SMF

Frameworks

• JQuery
• TinyMCE

SEO optimization

• apache mod rewrite
• lighthttp mod rewrite
• Site code optimization
• Search engines registrations
• Site link modifications
• Site code validation
• Responsive Design

Virtualization

• Xen
• QEMU-KVM