I'm a linux sysadmin and have worked in a web hosting company for more than eight years and now doing a full-time sysadmin consulting. I handle servers from co-locations/data centers to different vps and cloud hosting providers such as Rackspace, Amazon, Linode, DigitalOcean, and Softlayer. I managed mostly lamp-stack servers on CentOS/RHEL and Debian/Ubuntu and several cPanel/WHM servers for shared hosting clients. Operating Systems: Cloud and Hosting Providers: Virtualization and Cloud technologies: Hosting Control Panels: DNS: -- Manage DNS cluster on Cpanel DNSOnly versions. Manage zones hosted and integrated with Cpanel servers. - Manage Bind DNS service on dedicated and Cpanel servers (WHM and DNSOnly versions). Manage zones hosted at Softlayer and integrated with Cpanel servers - Managed DNS from different hosting providers (Godaddy, NetworkSolutions, SRSPlus)