mysql.sock的所有者所属组以及权限全部都是问号？求助神回复如何删除，亦或是如何重建，必有重谢！！！
代码如下：
[root@DBServer-BAK lib]# cd /tmp
[root@DBServer-BAK tmp]# ll
ls: 无法访问mysql.sock: 输入/输出错误
总用量 40
drwxr-xr-x 2 root root 4096 6月 25 11:16 hsperfdata_root
s????????? ? ? ? ? ? mysql.sock
-rw------- 1 mysql mysql 6 6月 25 11:34 mysql.sock.lock
-rwxrwxrwx 1 root root 45 6月 25 11:46 mysql.sock.tar.gz
drwx------ 3 root root 4096 6月 25 11:16 systemd-private-0a3b207663d847a183bbad804fca0ebd-colord.service-sic0B1
drwx------ 3 root root 4096 6月 25 11:16 systemd-private-0a3b207663d847a183bbad804fca0ebd-cups.service-4zk1XQ
drwx------ 3 root root 4096 6月 25 11:16 systemd-private-0a3b207663d847a183bbad804fca0ebd-rtkit-daemon.service-aM0JqV
drwx------ 3 root root 4096 6月 20 07:42 systemd-private-6d51751ab45a4174b26d3719b9ce8eee-colord.service-1RN8yw
drwx------ 3 root root 4096 6月 20 07:42 systemd-private-6d51751ab45a4174b26d3719b9ce8eee-cups.service-vXDiW2
drwx------ 3 root root 4096 6月 20 07:42 systemd-private-6d51751ab45a4174b26d3719b9ce8eee-rtkit-daemon.service-zCu1j4
drwx------ 2 ytomsbag ytomsbag 4096 6月 21 11:23 tracker-extract-files.1000
错误日志如下：
2019-06-25T05:00:27.641394Z 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
2019-06-25T05:00:27.642251Z 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active.
2019-06-25T05:00:27.642263Z 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active.
2019-06-25T05:00:27.643015Z 0 [Note] InnoDB: Waiting for purge to start
2019-06-25T05:00:27.693118Z 0 [Note] InnoDB: 5.7.19 started; log sequence number 2539728
2019-06-25T05:00:27.693642Z 0 [Note] InnoDB: Loading buffer pool(s) from /usr/local/mysql/data/ib_buffer_pool
2019-06-25T05:00:27.693845Z 0 [Note] Plugin 'FEDERATED' is disabled.
2019-06-25T05:00:27.694464Z 0 [Note] InnoDB: Buffer pool(s) load completed at 190625 13:00:27
2019-06-25T05:00:27.698589Z 0 [Warning] Failed to set up SSL because of the following SSL library error: SSL context is not
usable without certificate and private key
2019-06-25T05:00:27.698608Z 0 [Note] Server hostname (bind-address): '*'; port: 3306
2019-06-25T05:00:27.698645Z 0 [Note] IPv6 is available.
2019-06-25T05:00:27.698657Z 0 [Note] - '::' resolves to '::';
2019-06-25T05:00:27.698702Z 0 [Note] Server socket created on IP: '::'.
2019-06-25T05:00:27.698752Z 0 [ERROR] Could not create unix socket lock file tmp/mysql.sock.lock.
2019-06-25T05:00:27.698766Z 0 [ERROR] Unable to setup unix socket lock file.
2019-06-25T05:00:27.698773Z 0 [ERROR] Aborting
2019-06-25T05:00:27.698781Z 0 [Note] Binlog end
