# File lib/specinfra/backend/jexec.rb, line 4
      def initialize(config = {})
        super(config)
        jname = get_config(:jail_name)
        jroot = `jls -j #{jname} path`.strip
        fail 'fail to get jail path!' if jroot.to_s.empty?
        set_config(:jail_root, jroot)
      end