Future topics:
creating keys for ssh
Munin
capistrano
git syntax
cap deploy syntax, db migrate...
gems, rails, environment.rb
production database setup for rails
grep syntax
chmod
setup log rotate
apache overview: restart, config files,.htaccess...
top (snapshot)
passenger
irb
edit sudo users
gem install
assign multiple values to a key through a web form (and merge a new key)
Have cap deploy not prompt for password to restart using passenger
