Found in 1 comment on Hacker News
kordless · 2012-11-25 · Original thread
You need these three things:

1. A book (http://www.amazon.com/System-Administration-Handbook-Edition...)

2. An infrastructure (http://openstack.org/)

3. A community (http://serverfault.com/)

Oh, and some fun (http://www.commandlinefu.com/commands/browse)

:)

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