src/testbed/sample_hosts.txt

   1 totakura@192.168.0.1:22
   2 totakura@192.168.0.2:22
   3 totakura@192.168.0.3:22
   4 totakura@192.168.0.4:22
   5 totakura@192.168.0.5:22
   6 totakura@192.168.0.6:22
   7 totakura@192.168.0.7:22
   8 totakura@192.168.0.8:22
   9 totakura@192.168.0.9:22
  10 totakura@192.168.0.10:22
  11 totakura@192.168.0.11:22
  12 totakura@192.168.0.12:22
  13 totakura@192.168.0.13:22
  14 totakura@192.168.0.14:22
  15 totakura@192.168.0.15:22