1、系统和python版本CentOS Linux release 7.5.1804 (Core)[root@node02-97 ~]# python -VPython 2.7.5
2、os.system("pwd")
3、os.popen('pwd','r')
4、commands.getstatusoutput('ls')
5、subprocess.call(['ls','-l'],shell=True)
6、subprocess.check_output(["echo","hello world!"])
7、os.spawnv(os.P_NOWAIT, 'ls', '-l')