Kiểm tra version Centos

1. Lệnh RPM:
# rpm --query centos-release
centos-release-6-9.el6.12.3.x86_64

# rpm --query centos-release
centos-release-7-2.1511.el7.centos.2.10.x86_64

2. Lệnh hostnamectl

# hostnamectl

Static hostname: localhost.localdomain

Icon name: computer-vm

Chassis: vm

Machine ID: 36252b628d10412e8ed195ef08ec7076

Boot ID: b05ad5db8fec46bc9ab3507deb1bded6

Virtualization: vmware

Operating System: CentOS Linux 7 (Core)

CPE OS Name: cpe:/o:centos:centos:7

Kernel: Linux 3.10.0-862.3.3.el7.x86_64

Architecture: x86-64