查看centos系統版本的方法：
推薦：《centos使用教學》
1、使用lsb_release -a指令查看
[root@centos6 ~]# lsb_release -a LSB Version: :base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch Distributor ID: CentOS Description: CentOS release 6.9 (Final) Release: 6.9 Codename: Final
但是，centos7.3裡沒有lsb_release指令。
2、使用cat /etc/os-release指令開啟檔案檢視
[root@centos7 app]# 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、使用cat /etc/redhat-release（/etc/centos-release）指令查看
[root@centos6 ~]# cat /etc/redhat-release CentOS release 6.9 (Final) [root@centos7 app]# cat /etc/redhat-release CentOS Linux release 7.3.1611 (Core)
4、使用rpm -q centos-release指令查看
[root@centos6 ~]# rpm -q centos-release centos-release-6-9.el6.12.3.x86_64 [root@centos7 app]# rpm -q centos-release centos-release-7-3.1611.el7.centos.x86_64
#推薦學習
Linux影片教學：https://www.php.cn/ course/list/33.html
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