memcache不能成功启动 报以下错误 开始还以为是rabbit的问题，因为rabbit修改主机名之后老师出现不能启动成功的问题
这是在搭建openstack私有云的时候报的错
31 14:19:36 linux-node4.openstack rabbitmq-server[2583]: Kernel pid terminated (application_controller) ({application_start_failure,kernel,{{shutdown,{failed_to_start_child,net_sup,{shutdown,{failed_to_start_child,auth,{"Cookie file /var/lib/rabbitmq/.erl
8月 31 14:19:36 linux-node4.openstack rabbitmq-server[2583]: Crash dump is being written to: erl_crash.dump...done 8月 31 14:19:36 linux-node4.openstack systemd[1]: rabbitmq-server.service: main process exited, code=exited, status=1/FAILURE 8月 31 14:19:38 linux-node4.openstack rabbitmqctl[2687]: Error: Failed to initialize erlang distribution: {{shutdown, 8月 31 14:19:38 linux-node4.openstack rabbitmqctl[2687]: {failed_to_start_child, 8月 31 14:19:38 linux-node4.openstack rabbitmqctl[2687]: auth, 8月 31 14:19:38 linux-node4.openstack rabbitmqctl[2687]: {"Cookie file /var/lib/rabbitmq/.erlang.cookie must be accessible by owner only", 8月 31 14:19:38 linux-node4.openstack rabbitmqctl[2687]: [{auth,init_cookie,0, 8月 31 14:19:38 linux-node4.openstack rabbitmqctl[2687]: [{file,"auth.erl"},8月 31 14:19:38 linux-node4.openstack rabbitmqctl[2687]: {line,286}]},
解决 yum reinstall memcached python-memcached -y
