有以下命令可以查看：
lsb_release -a
LSB Version: :core-3.1-ia32:core-3.1-noarch:graphics-3.1-ia32:graphics-3.1-noarch
Distributor ID: CentOS
Description: CentOS release 5.4 (Final)
Release: 5.4
Codename: Final
這個命令適用於所有的linux，包括Redhat、SuSE、Debian等發行版。
root@MyMail ~ # uname
Linux
root@MyMail ~ # uname -r
2.6.18-164.el5
以下二種方法適用於RedHat,CentOS：
root@MyMail ~ # cat /etc/redhat-release
CentOS release 5.4 (Final)
root@MyMail ~ # rpm -q centos-release #rpm -q redhat-release
centos-release-5-4.el5.centos.1