mysql无法正常启动，查看日志报如下异常
2016-07-07T01:06:32.929615Z 0 [ERROR] Fatal error: Please read "Security" section of the manual to find out how to run mysqld as root! 2016-07-07T01:06:32.929924Z 0 [ERROR] Aborting 2016-07-07T01:06:32.929970Z 0 [Note] Binlog end 2016-07-07T01:06:32.930860Z 0 [Note] /usr/local/mysql/bin/mysqld: Shutdown complete
用命令行启动mysql报：
[root@CB-62876 mysqldata]# sudo service mysqld restart MySQL server PID file could not be found![FAILED] Starting MySQL..The server quit without updating PID file (/data/mysqldata//CB-62876.pid).[FAILED]
用root用户启动，报：
mysqld: Can't create/write to file '/tmp/ib6Wq7Cs' (Errcode: 30 - Read-only file system)
各种权限、启动方式都试过了，仍然如此。后来重启后边解决了。目前还不知道具体什么原因引起的。初步猜测有可能是由于selinux或者备份导致的异常，先记录于此，以便后续跟进。
