killportholder.py

#!/usr/bin/python
# kills the process holding the TCP port passed as a command line argument

import subprocess
import os, sys


if len(sys.argv) < 2:
	print "Missing argument: TCP port"
	sys.exit(1)

port = sys.argv[1]
p = subprocess.Popen(("fuser -n tcp %s" % port).split(), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
pid = p.communicate()[0].strip()

if pid:
	print "killing %s" % pid
	os.system("kill -9 %s" % pid)

killportholder.rb

#!/usr/bin/ruby
# kills the process holding the TCP port passed as a command line argument

if not ARGV[0]
	puts "Missing argument: TCP port"
	exit!(1)
end

port = ARGV[0]

IO.popen("fuser -n tcp #{port}") do |p|
	if p.gets =~ /.*?(\d+)$/
		puts "killing #{$1}"
		IO.popen("kill -9 #{$1}")
	end
end