Commands and files to check the version of CentOS Linux

Overview

--Check the contents of commands and files to check the version of CentOS Linux or Linux kernel

/etc/centos-release

$ cat /etc/centos-release
CentOS Linux release 8.1.1911 (Core)

/etc/centos-release-upstream

$ cat /etc/centos-release-upstream
Derived from Red Hat Enterprise Linux 8.1 (Source)

/etc/os-release

$ cat /etc/os-release
NAME="CentOS Linux"
VERSION="8 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="8"
PLATFORM_ID="platform:el8"
PRETTY_NAME="CentOS Linux 8 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:8"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-8"
CENTOS_MANTISBT_PROJECT_VERSION="8"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="8"

/etc/system-release-cpe

$ cat /etc/system-release-cpe
cpe:/o:centos:centos:8

Files with release under / etc /

The version information is listed in the file around here. Many are symbolically linked.

$ ls -l /etc/ | grep release
-rw-r--r--1 root root 38 March 13 04:15 centos-release
-rw-r--r--1 root root 51 March 13 04:15 centos-release-upstream
lrwxrwxrwx 1 root root 21 March 13 04:15 os-release -> ../usr/lib/os-release
lrwxrwxrwx 1 root root 14 March 13 04:15 redhat-release -> centos-release
lrwxrwxrwx 1 root root 14 March 13 04:15 system-release -> centos-release
-rw-r--r--.1 root root 23 March 13 04:15 system-release-cpe

uname: kernel information

$ uname -m
x86_64

$ uname -o
GNU/Linux

$ uname -r
4.18.0-147.5.1.el8_1.x86_64

$ uname -s
Linux

$ uname -v
#1 SMP Wed Feb 5 02:00:39 UTC 2020

$ uname -morsv
Linux 4.18.0-147.5.1.el8_1.x86_64 #1 SMP Wed Feb 5 02:00:39 UTC 2020 x86_64 GNU/Linux

$ uname -a
Linux foo.example.com 4.18.0-147.5.1.el8_1.x86_64 #1 SMP Wed Feb 5 02:00:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

lsb_release: LSB (Linux Standard Base) information

$ lsb_release -a
LSB Version:	:core-4.1-amd64:core-4.1-noarch
Distributor ID:	CentOS
Description:	CentOS Linux release 8.1.1911 (Core) 
Release:	8.1.1911
Codename:	Core

The lsb_release command is included in the redhat-lsb-core package, so install it with dnf install redhat-lsb-core if necessary.

hostnamectl

$ hostnamectl
   Static hostname: foo.example.com
         Icon name: computer-vm
           Chassis: vm
        Machine ID: 11112222333344445555666677778888
           Boot ID: ffffeeeeddddccccbbbbaaaa00009999
    Virtualization: kvm
  Operating System: CentOS Linux 8 (Core)
       CPE OS Name: cpe:/o:centos:centos:8
            Kernel: Linux 4.18.0-147.5.1.el8_1.x86_64
      Architecture: x86-64

Reference material

-Red Hat Enterprise Linux Release Date and List of Included Kernels -Red Hat Customer Portal

• Man page of UNAME
• os-release
• lsb_release (Linux Standard Base Core Specification 4.1) -[6 \ .3 . Hostname setting using hostnamectl Red Hat Enterprise Linux 7 \ | Red Hat Customer Portal](https://access.redhat.com/documentation/ja_jp/red_hat_enterprise_linux/7/html/networking_guide] / sec_configuring_host_names_using_hostnamectl)