Check if multiple hosts are online from a list of addresses.

check-hosts.py

#!/usr/bin/env python
import os, sys, fileinput

try:
	host_list = sys.argv[1]
	pass
except IndexError as e:
	if sys.argv[0].startswith('./'):
		print "Usage: %s /path/to/list 	-- List that contains target IP addresses" % sys.argv[0]
		sys.exit()
	else:
		print "Usage ./%s /path/to/list -- List that contains target IP addresses" % sys.argv[0]
		sys.exit()


def ping(host):
	response = os.popen("timeout 2 ping -c 1 " + host).read()

	if '0% packet loss' in response:
		print "Host: %s is \033[92mup!\033[0m" % host
	else:
		print "Host: %s is \033[91mdown\033[0m!" % host
	pass


if __name__ == '__main__':
	with open(host_list, "r") as tlist:
		hosts = []
		for host in tlist:
			hosts.append(host)
			pass
		pass
	
	hosts = [line.rstrip('\n') for line in open(host_list)] # erase '\n' from end of lines
	
	hosts = filter(None, hosts) # filter blank lines

	try:
		print "Results may vary depending on your internet connection.\n"
		for host in hosts:
			ping(host)
			pass
		pass
	except KeyboardInterrupt:
		print ""
	pass

Updated, fixed up how it checked if a server was online.
Also added a timeout so you don't have to wait 5 minutes for it to keep trying to ping a server until it finally
tells you that it is down.