DevOps – Linux administration – since Redhat was version 5.x. (about 1998). I like CentOS / Redhat, but I am starting to really like Ubuntu.
My programming experience accentuates Devops in things like scripting, process and deployment automation. And yes, I am familiar with AWS, as well as some great alternatives for cloud services.
Apache, MySQL, Vagrant, NodeJS, Virtualization using OpenVZ (Virtuozzo), Docker, BASH