Linux—系统管理
查看系统版本
CentOS系统
# centos7查看命令[root@localhost ~]# cat /etc/os-release
# centos6/7通用命令
[root@localhost ~]# cat /etc/redhat-release
[root@localhost ~]# cat /etc/redhat-release | sed -r "s/.* ([0-9]+)..*/1/"
# centos6/7通用命令
[root@localhost ~]# cat /etc/centos-release
[root@localhost ~]# cat /etc/centos-release | sed -r "s/.* ([0-9]+)..*/1/"
# centos6/7通用命令
[root@localhost ~]# rpm -q centos-release
[root@localhost ~]# rpm -q centos-release | cut -d- -f3
# radhat或centos存在/etc/redhat-release这个文件。【命令 cat /etc/redhat-release】
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