jingwen@jingwen-virtual-machine:~$ sudo lsb_release -a
运行的结果：
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 11.04
Release: 11.04
Codename: natty
jingwen@jingwen-virtual-machine:~$ sudo lsb_release -a
运行的结果：
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 11.04
Release: 11.04
Codename: natty