服务器重启后，mysql服务启动失败

2018-03-09 23:08:43 2389 [Note] Plugin 'FEDERATED' is disabled.
2018-03-09 23:08:43 2389 [Note] InnoDB: Using atomics to ref count buffer pool pages
2018-03-09 23:08:43 2389 [Note] InnoDB: The InnoDB memory heap is disabled
2018-03-09 23:08:43 2389 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2018-03-09 23:08:43 2389 [Note] InnoDB: Memory barrier is not used
2018-03-09 23:08:43 2389 [Note] InnoDB: Compressed tables use zlib 1.2.3
2018-03-09 23:08:43 2389 [Note] InnoDB: Using Linux native AIO
2018-03-09 23:08:43 2389 [Note] InnoDB: Using CPU crc32 instructions
2018-03-09 23:08:43 2389 [Note] InnoDB: Initializing buffer pool, size = 512.0M
2018-03-09 23:08:43 2389 [Note] InnoDB: Completed initialization of buffer pool
2018-03-09 23:08:43 2389 [Note] InnoDB: Highest supported file format is Barracuda.
2018-03-09 23:08:43 2389 [Note] InnoDB: 128 rollback segment(s) are active.
2018-03-09 23:08:43 2389 [Note] InnoDB: Waiting for purge to start
2018-03-09 23:08:43 2389 [Note] InnoDB: 5.6.38 started; log sequence number 1708640
2018-03-09 23:08:43 2389 [Note] Server hostname (bind-address): '*'; port: 3306
2018-03-09 23:08:43 2389 [Note] IPv6 is available.
2018-03-09 23:08:43 2389 [Note]   - '::' resolves to '::';
2018-03-09 23:08:43 2389 [Note] Server socket created on IP: '::'.
2018-03-09 23:08:43 2389 [ERROR] Can't start server : Bind on unix socket: Address already in use
2018-03-09 23:08:43 2389 [ERROR] Do you already have another mysqld server running on socket: /tmp/mysql.sock ?
2018-03-09 23:08:43 2389 [ERROR] Aborting

输入这条命令看看

1. lsof -i :3306

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