查看ubuntu版本号

方法一：

shan@shan-VirtualBox:~$ cat /etc/issue

Ubuntu 11.04 \n \l

方法二：

shan@shan-VirtualBox:~$ lsb_release -a

No LSB modules are available.

Distributor ID: Ubuntu

Description: Ubuntu 11.04

Release: 11.04

Codename: natty

方法三：

shan@shan-VirtualBox:~$ cat /etc/lsb-release 

DISTRIB_ID=Ubuntu

DISTRIB_RELEASE=11.04

DISTRIB_CODENAME=natty

DISTRIB_DESCRIPTION="Ubuntu 11.04"

方法四：

shan@shan-VirtualBox:~$ cat /proc/version

Linux version 2.6.38-8-generic (buildd@vernadsky) (gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu3) ) #42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011

方法五：

shan@shan-VirtualBox:~$ uname -a

Linux shan-VirtualBox 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011 i686 i686 i386 GNU/Linux