old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  import os
  import sys
  
  # System info
  os.system('free -m')
  os.system('mpstat -P ALL')
  os.system('cat /proc/cpuinfo')
  # Test help menu command
  os.system('time python nettacker.py --help')
  # Test show version command
  os.system('time python nettacker.py --version')
  # Test all modules command + check if it's finish successfully + without graph
  if os.system("time python nettacker.py -i 127.0.0.1 -u user1,user2 -p "
               "pass1,pass2 -m all -g 21,25,80,443 -t 2 -T 0.1") is not 0:
      sys.exit(1)
  # Test all modules command + check if it's finish successfully + with graph
  if os.system("time python nettacker.py -i 127.0.0.1 -u user1,user2 -p "
               "pass1,pass2 -m all -g 21,25,80,443 -t 2 -T 0.1 --graph d3_tree_v2_graph") is not 0:
      sys.exit(1)
  # Test all modules command + check if it's finish successfully + without graph + Farsi
  if os.system("time python nettacker.py -i 127.0.0.1 -u user1,user2 -p "
               "pass1,pass2 -m all -g 21,25,80,443 -t 2 -T 0.1 -L fa") is not 0:
      sys.exit(1)
  # Test all modules command + check if it's finish successfully + with graph + Farsi
  if os.system("time python nettacker.py -i 127.0.0.1 -u user1,user2 -p "
               "pass1,pass2 -m all -g 21,25,80,443 -t 2 -T 0.1 -L fa --graph d3_tree_v2_graph") is not 0:
      sys.exit(1)
  # Test all modules for second time (testing cache) command
  os.system("time python nettacker.py -i 127.0.0.1 -u user1,user2 -p pass1,pass2 -m all -g 21,25,80,443 -t 2 -T 0.1")
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  import os
  import sys
  
  # Test help menu command
  os.system('time python nettacker.py --help')
  # Test show version command
  os.system('time python nettacker.py --version')
  # Test all modules command + check if it's finish successfully + without graph
  if os.system("time python nettacker.py -i 127.0.0.1 -u user1,user2 -p "
               "pass1,pass2 -m all -g 21,25,80,443 -t 2 -T 0.1 -v 5") is not 0:
      sys.exit(1)
  # Test all modules command + check if it's finish successfully + with graph
  if os.system("time python nettacker.py -i 127.0.0.1 -u user1,user2 -p "
               "pass1,pass2 -m all -g 21,25,80,443 -t 2 -T 0.1 --graph d3_tree_v2_graph -v 5") is not 0:
      sys.exit(1)
  # Test all modules command + check if it's finish successfully + without graph + Farsi
  if os.system("time python nettacker.py -i 127.0.0.1 -u user1,user2 -p "
               "pass1,pass2 -m all -g 21,25,80,443 -t 2 -T 0.1 -L fa -v 5") is not 0:
      sys.exit(1)
  # Test all modules command + check if it's finish successfully + with graph + Farsi
  if os.system("time python nettacker.py -i 127.0.0.1 -u user1,user2 -p "
               "pass1,pass2 -m all -g 21,25,80,443 -t 2 -T 0.1 -L fa --graph d3_tree_v2_graph -v 5") is not 0:
      sys.exit(1)
  # Test all modules for second time (testing cache) command
  os.system("time python nettacker.py -i 127.0.0.1 -u user1,user2 -p pass1,pass2 -m all -g 21,25,80,443 -t 2 -T 0.1 -v 5")
  
subject: update travis script, enable verbose mode