Check CentOS Version

The 4 files shown below provides the updated version of the CentOS/Redhat OS.

  1. /etc/system-release
  2. /etc/os-release
  3. /etc/redhat-release
  4. /etc/centos-release

1. /etc/system-release

$ cat /etc/system-release

CentOS Linux release 7.5.1804 (Core)

2. /etc/os-release

$ 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"

3. /etc/redhat-releas

$ cat /etc/redhat-release

CentOS Linux release 7.5.1804 (Core)

4.  /etc/centos-release

$ cat /etc/centos-release

CentOS Linux release 7.5.1804 (Core)