2019-12-21 22:06:36 26587 [Note] Plugin 'FEDERATED' is disabled.
2019-12-21 22:06:36 26587 [Note] InnoDB: Using atomics to ref count buffer pool pages
2019-12-21 22:06:36 26587 [Note] InnoDB: The InnoDB memory heap is disabled
2019-12-21 22:06:36 26587 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2019-12-21 22:06:36 26587 [Note] InnoDB: Memory barrier is not used
2019-12-21 22:06:36 26587 [Note] InnoDB: Compressed tables use zlib 1.2.11
2019-12-21 22:06:36 26587 [Note] InnoDB: Using Linux native AIO
2019-12-21 22:06:36 26587 [Note] InnoDB: Using CPU crc32 instructions
2019-12-21 22:06:37 26587 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2019-12-21 22:06:37 26587 [Note] InnoDB: Completed initialization of buffer pool
2019-12-21 22:06:37 26587 [Note] InnoDB: Highest supported file format is Barracuda.
2019-12-21 22:06:37 26587 [Note] InnoDB: 128 rollback segment(s) are active.
2019-12-21 22:06:37 26587 [Note] InnoDB: Waiting for purge to start
2019-12-21 22:06:37 26587 [Note] InnoDB: 5.6.46 started; log sequence number 1626107
2019-12-21 22:06:37 26587 [Note] RSA private key file not found: /var/lib/mysql//private_key.pem. Some authentication plugins will not work.
2019-12-21 22:06:37 26587 [Note] RSA public key file not found: /var/lib/mysql//public_key.pem. Some authentication plugins will not work.
2019-12-21 22:06:37 26587 [Note] Server hostname (bind-address): '*'; port: 3507
2019-12-21 22:06:37 26587 [Note] IPv6 is available.
2019-12-21 22:06:37 26587 [Note] - '::' resolves to '::';
2019-12-21 22:06:37 26587 [Note] Server socket created on IP: '::'.
2019-12-21 22:06:37 26587 [ERROR] Can't start server: Bind on TCP/IP port: Permission denied
2019-12-21 22:06:37 26587 [ERROR] Do you already have another mysqld server running on port: 3507 ?
2019-12-21 22:06:37 26587 [ERROR] Aborting
很二，此問題竟然是沒關安全增強型Linux，即SELINUX=disabled，用vi /etc/selinux/config
這個沒關閉后就會導致systemctl start mysql，啟動耗時在10分鍾左右，然后報超時錯誤
設置完成后重啟服務器后就可以正常啟動MySQL了，哎，太傷。