查看ubuntu系统版本信息方法一：cat /etc/issue            返回结果：Ubuntu 8.04.1 \n \l方法二：cat /proc/version             返回结果：Linux version 2.6.24-21-generic (buildd@palmer) (gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu7)) #1 SMP Mon Aug 25 17:32:09 UTC 2008方法三：uname -a             返回结果：Linux wwt-laptop 2.6.24-21-generic #1 SMP Mon Aug 25 17:32:09 UTC 2008 i686 GNU/Linux方法四：lsb_release -a             返回结果：                            No LSB modules are available.                            Distributor ID:    Ubuntu                            Description:    Ubuntu 8.04.1                            Release:    8.04                            Codename:    hardy方法五：cat /etc/lsb-release             返回结果：                            DISTRIB_ID=Ubuntu                            DISTRIB_RELEASE=8.04                            DISTRIB_CODENAME=hardy                            DISTRIB_DESCRIPTION="Ubuntu 8.04.1"