查看Ubuntu版本

root@wiki:~# cat /etc/issue
Ubuntu 14.04.1 LTS \n \l

root@wiki:~# sudo lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.1 LTS
Release:        14.04
Codename:       trusty

root@wiki:~# cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.1 LTS"

root@wiki:~# cat /proc/version
Linux version 3.13.0-45-generic (buildd@phianna) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #74-Ubuntu SMP Tue Jan 13 19:36:28 UTC 2015

root@wiki:~# uname -a
Linux wiki 3.13.0-45-generic #74-Ubuntu SMP Tue Jan 13 19:36:28 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

root@wiki:~# uname -r
3.13.0-45-generic