python執行linux命令有兩種方法：
在此以Linux常用的ls命令為例：
方法一：使用os模組
shell# python
>> import os
>> os.system('ls -l')執行結果：
drwxr-xr-x 2 root root 4096 2012-03-12 bin drwxr-xr-x 4 root root 1024 2011-10-31 boot drwxr-xr-x 6 root root 4096 2011-11-22 data drwxr-xr-x 12 root root 3620 01-11 16:01 dev drwxr-xr-x 93 root root 12288 01-17 04:02 etc drwxr-xr-x 16 root root 4096 10-18 18:53 home drwxr-xr-x 11 root root 4096 2012-03-12 lib drwxr-xr-x 8 root root 4096 2012-01-20 lib64 drwx------ 2 root root 16384 2011-10-31 lost+found drwxr-xr-x 2 root root 4096 2010-01-27 media drwxr-xr-x 2 root root 0 01-11 16:00 misc drwxr-xr-x 2 root root 4096 2011-12-02 mnt drwxr-xr-x 2 root root 0 01-11 16:00 net drwxr-xr-x 12 root root 4096 2011-11-22 new drwxr-xr-x 2 root root 4096 2010-01-27 opt dr-xr-xr-x 168 root root 0 01-11 15:59 proc drwxr-x--- 6 root root 4096 11-06 11:30 root drwxr-xr-x 2 root root 12288 2012-03-31 sbin drwxr-xr-x 2 root root 4096 2011-10-31 selinux drwxr-xr-x 2 root root 4096 2010-01-27 srv drwxr-xr-x 11 root root 0 01-11 15:59 sys drwxrwxrwt 4 root root 20480 01-18 04:02 tmp drwxr-xr-x 16 root root 4096 07-25 16:34 usr drwxr-xr-x 21 root root 4096 2011-11-02 var
方法二：使用subprocess模組
shell# python
>> import subprocess
>> subprocess.call('ls -l'.split())執行結果是相同的。
ps：開發中最常用的方法是os模組方法。