add (Net::SSH::KnownHosts)

        # File lib/net/ssh/known_hosts.rb, line 52
    52:       def add(host, key, options={})
    53:         hostfiles(options, :user).each do |file|
    54:           begin
    55:             KnownHosts.new(file).add(host, key)
    56:             return
    57:           rescue SystemCallError
    58:             # try the next hostfile
    59:           end
    60:         end
    61:       end