- Centos / Debian / Ubuntu 
- Веб сервера: nginx - apache, nginx - php-fpm, apache
- squid, socks, openvpn
- postfix, opendkim, dovecot, roundcube, postfixadmin, spamassasin
- git, gitlab, gitlab-ci
- zabbix
- asterisk (queue, IVR, mixmonitor)
- bash 
- AWS (Ec2, route53, LoadBalancer)
- Google Cloud (App engine)
- Proxmox, Openvz
- DNS (named, powerdns)
- FTP, SFTP
- Backup

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