查看操作系统版本等信息

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.3 LTS
Release:        14.04
Codename:       trusty

uname -a

$ cat /etc/redhat-release
CentOS Linux release 7.6.1810 (Core)

uname -a