如何检查CentOS版本：5种方法

 cat /etc/redhat-release

[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.6.1810 (Core)

hostnamectl

[root@localhost ~]# hostnamectl
   Static hostname: localhost.localdomain
         Icon name: computer-vm
           Chassis: vm
        Machine ID: 49723fda505648acb1807b741040eece
           Boot ID: b504ae607d554607907d327b2d0d0124
    Virtualization: vmware
  Operating System: CentOS Linux 7 (Core)
       CPE OS Name: cpe:/o:centos:centos:7
            Kernel: Linux 3.10.0-957.el7.x86_64
      Architecture: x86-64

rpm -q centos-release

[root@localhost ~]# rpm -q centos-release
centos-release-7-6.1810.2.el7.centos.x86_64

cat /proc/version

[root@localhost ~]# cat /proc/version
Linux version 3.10.0-957.el7.x86_64 ([email protected]) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) ) #1 SMP Thu Nov 8 23:39:32 UTC 2018

uname -a

[root@localhost ~]# uname -a
Linux localhost.localdomain 3.10.0-957.el7.x86_64 #1 SMP Thu Nov 8 23:39:32 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux