Make Chef's `knife ssh` use your actual login name

knife.rb

# knife.rb config snippet to make knife ssh command use your own login
# instead of hard-coded `root', `ubuntu' or other name. Tries to get
# login for your domain from ~/.ssh/config and if it's not found
# there, uses your local login.

require 'net/ssh'
require 'etc'

knife[:ssh_user] =
  Net::SSH::Config.for('some.host.inside.your.domain')[:user] ||
  Etc.getlogin