linux version info

[root@webtest opt]# 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@webtest opt]# lsb_release -a
bash: lsb_release: 명령을 찾을 수 없습니다...

[root@webtest opt]# hostnamectl
   Static hostname: webtest
         Icon name: computer-server
           Chassis: server
        Machine ID: 702ea74f27724e36b134c9294c737378
           Boot ID: ea0397058213438e86096c0b5ffbd6de
  Operating System: CentOS Linux 7 (Core)
       CPE OS Name: cpe:/o:centos:centos:7
            Kernel: Linux 3.10.0-693.21.1.el7.x86_64
      Architecture: x86-64
[root@webtest opt]#