linux上查看系统版本

[root@serv-test liexin521]# cat /etc/redhat-release
CentOS release 6.10 (Final)



[root@serv-test liexin521]# uname -r
2.6.32-754.25.1.el6.x86_64

[root@host-234 liexin521]# hostnamectl 
   Static hostname: host-234
         Icon name: computer-server
           Chassis: server
        Machine ID: 0b8bf38d7642435c8f01a74bc7897acd
           Boot ID: 44e84c2a176249c1a14385aed0c1a8b2
  Operating System: CentOS Linux 7 (Core)
       CPE OS Name: cpe:/o:centos:centos:7
            Kernel: Linux 3.10.0-1127.19.1.el7.x86_64
      Architecture: x86-64