Installation:

close_port.rb

#!/usr/bin/env ruby

# Synced on Dropbox.
# Synced on https://gist.github.com/Overload119/3cecbf8391d8bb7af635a608c0367e8e
# cp ThisFile /usr/local/bin/close_port

running_apps = `lsof -i:#{ARGV[0]}`
return if running_apps.empty?
output_lines = running_apps.split("\n")
output_lines.drop(1).each do |line|
  row = line.split(' ')
  pid = row[1].to_i
  app_name = row[0]
  # Skip apps that should not be killed.
  next if ARGV[1] && app_name != ARGV[1]
  Process.kill('TERM', pid)
  puts "TERM -> #{pid}"
  fork do
    sleep 1.5 # Expect the process to die after 1.5 seconds.
    is_process_alive = Process.getpgid(pid) rescue false
    if is_process_alive
      Process.kill('KILL', pid)
      puts "KILL -> #{pid}"
    end
  end
end

Usage close_port 1337 ruby

Installation

curl https://gist.githubusercontent.com/Overload119/3cecbf8391d8bb7af635a608c0367e8e/raw/d9da99b9f34a053eb13a8cb386fa2390b008ad79/close_port.rb >> /tmp/close_port.rb
sudo mv /tmp/close_port.rb /usr/local/bin/close_port
chmod +x /usr/local/bin/close_port