Useful Commands to Check the Cent OS Version .

1-This Command cat /etc/os-release will show you all the information of your OS.

[root@localhost ~]# cat /etc/os-release
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"
CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"
[root@localhost ~]#

2-hostnamectl is a command which you can use to find your CentOS branch.

[root@localhost ~]# hostnamectl
   Static hostname: localhost.localdomain
         Icon name: computer-server
           Chassis: server
        Machine ID: 160b6802caa5486ab65338097bae5b84
           Boot ID: fc1010da9d3b40b793c0734e2a652c82
  Operating System: CentOS Linux 7 (Core)
       CPE OS Name: cpe:/o:centos:centos:7
            Kernel: Linux 3.10.0-1160.el7.x86_64
      Architecture: x86-64
[root@localhost ~]#

3-You can use a command cat /etc/centos-release to see the centos release

[root@localhost ~]# cat /etc/centos-release
CentOS Linux release 7.9.2009 (Core)
[root@localhost ~]#

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