centos7改回传统命名方式

centos7 centos centos7.5 centos6.5 centos6.8 centos7.7 centos6.4 tostring centos6.6 centos6.x centos 6.5 centos 7.4 centos5.3 rtos autossh centos 7.6 tostring() centos docker linux centos autoscaling