The areas I'm currently covering are as follows: -Linux: RHEL, Ubuntu, Debian, Centos, RedHat, Gentoo -Virtualization: RHEV/oVirt, VMWare, KVM/Qemu, Virtual Box, OpenNebula, ProxMox -Containers: Docker, Docker Compose, Kubernetties -Monitoring: Nagios, LibreNMS, Observium -Storage: NFS, Gluster -Networks: DNS, LAN, VLAN, Routing, Firewall, OVS, OpenVPN / Cisco, Juniper, Sophos, VyOS, Vyatta, OpenWrt, DDWrt, PfSense, HP -Backup, Clouds: Bacula, OwnCloud, NextCloud, Minio, SyncThing -DB: MySQL, MariaDB, DB2, PostgreSQL -Automation / Configurations: Python, Bash, Ansible, Pupppet, RestAPI, JSON, XML -Message Broker: Poxa, Redis, RabbitMQ -Provisioning: Satellite, Spacewalk, Foreman -GitHub/GitLab, Jenkins CI -Password gmnagement: Rattic, KeyPass, TeamPass -Web Server: Apache2, Nginx -Application Server: Ruby/Rails, JBoss, Django, Mono -HA: RHEV/oVirt, HAProxy -Email: Postfix, Dovecot, Modoboa, Citadel -VoIP: Asterisk, Elastix, FreePBX, PBIAF, ViciDial/OSDial/GoAutoDial -Hosting Panels: CPanel, VestaCP -Chat: IRC, Mattermost -Ticketing Systems/KB: Jira, QDPM, Confluence, KB (Wordpress), Ticketing Systeme (Wordpress) -Others: 3D VR Office, SSH per Browser, Guacamole, IPTV/Video Server, Web Streaming -Others/More - VideoMontage: BlackMagic Design, Adobe CC, Boris Red, Final Cut