如果无法添加成功,/etc/redhat-release文件覆盖过去
cat /etc/redhat-release
CentOS Linux release 7.1.1503 (Core)
Red Hat Enterprise Linux Server release 7.0 (Maipo)
以下有问题:
# cat /etc/redhat-releasebak
CentOS Linux release 7.1.1503 (Core)
hostOS: CentOS into a cluster,in which there are CentOS Red hosts added