import subprocess

class RunCmd(object):
    def start(self,cmd):
        self.cmd = cmd
        subprocess.call(self.cmd,shell=True)

a = RunCmd()
# a.start('chmod 777 cmd;chmod 777 gateway;chmod 777 worker;chmod 777 mainte;chmod 777 stup.sh;./cmd start --log')
a.start('chmod 777 cmd;chmod 777 gateway;chmod 777 worker;chmod 777 mainte;chmod 777 stup.sh;./cmd start')