# File lib/net/ssh/known_hosts.rb, line 64
64:       def add(host, key, options={})
65:         hostfiles(options, :user).each do |file|
66:           begin
67:             KnownHosts.new(file).add(host, key)
68:             return
69:           rescue SystemCallError
70:             # try the next hostfile
71:           end
72:         end
73:       end