/usr/sbin/mysql代码=退出状态203/EXEC错误

我不知道我到底做错了什么,但可能是我做了一些“chown”手术。我试图允许用户&;mysql组:mysql可以访问/media/usb驱动器,但可能无意中更改了其他内容。

当我这样做的时候 sudo systemctl start mysql.service 我犯了一个错误。经检查 sudo systemctl status mysqld ,我得到以下内容:

mysql.service - MySQL Community Server
   Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
   Active: activating (start-post) (Result: exit-code) since Fri 2020-06-19 08:11:01 EDT; 19s ago
  Process: 15459 ExecStart=/usr/sbin/mysqld (code=exited, status=203/EXEC)
  Process: 15444 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=0/SUCCESS)
 Main PID: 15459 (code=exited, status=203/EXEC);         : 15460 (mysql-systemd-s)
    Tasks: 2
   Memory: 2.4M
      CPU: 175ms
   CGroup: /system.slice/mysql.service
           └─control
             ├─15460 /bin/bash /usr/share/mysql/mysql-systemd-start post
             └─15687 sleep 1

Jun 19 08:11:01 apil-dlrig systemd[1]: Starting MySQL Community Server...
Jun 19 08:11:01 apil-dlrig systemd[1]: mysql.service: Main process exited, code=exited, status=203/EXEC

当我检查所有权时 /var/lib/mysql ,我得到以下内容,这似乎是合理的。即用户 mysql 对此文件夹拥有完全所有权。

apil@apil-dlrig:~$ sudo ls -la /var/lib/mysql
total 176212
drwx------  7 mysql mysql     4096 Jun 19 07:34 .
drwxr-xr-x 79 root  root      4096 Oct 30  2019 ..
-rw-r-----  1 mysql mysql       56 Oct 20  2019 auto.cnf
-rw-------  1 mysql mysql     1680 Nov 22  2019 ca-key.pem
-rw-r--r--  1 mysql mysql     1112 Nov 22  2019 ca.pem
-rw-r--r--  1 mysql mysql     1112 Nov 22  2019 client-cert.pem
-rw-------  1 mysql mysql     1676 Nov 22  2019 client-key.pem
-rw-r--r--  1 mysql mysql        0 May  5 06:38 debian-5.7.flag
drwxr-x---  2 mysql mysql     4096 Jun  6 13:44 foo
-rw-r-----  1 mysql mysql      665 Jun 19 07:34 ib_buffer_pool
-rw-r-----  1 mysql mysql 79691776 Jun 19 07:34 ibdata1
-rw-r-----  1 mysql mysql 50331648 Jun 19 07:34 ib_logfile0
-rw-r-----  1 mysql mysql 50331648 Oct 20  2019 ib_logfile1
-rw-r-----  1 mysql mysql      155 Jun 16 07:23 keyring_backup
drwxr-x---  2 mysql mysql     4096 May  5 06:38 mysql
-rw-r--r--  1 mysql mysql        6 May  5 06:38 mysql_upgrade_info
drwxr-x---  2 mysql mysql     4096 May  5 06:38 performance_schema
-rw-------  1 mysql mysql     1680 Nov 22  2019 private_key.pem
drwxr-x---  2 mysql mysql     4096 Jun 16 07:25 prod
-rw-r--r--  1 mysql mysql      452 Nov 22  2019 public_key.pem
-rw-r--r--  1 mysql mysql     1112 Nov 22  2019 server-cert.pem
-rw-------  1 mysql mysql     1680 Nov 22  2019 server-key.pem
drwxr-x---  2 mysql mysql    12288 Nov 22  2019 sys

这个 /etc/systemd/system/multi.user.wants.targets/mysql.service 看起来如下。这里什么都不应该改变,也就是说,它和MySQL一样默认。

# MySQL systemd service file

[Unit]
Description=MySQL Community Server
After=network.target

[Install]
WantedBy=multi-user.target

[Service]
User=mysql
Group=mysql
PermissionsStartOnly=true
ExecStartPre=/usr/share/mysql/mysql-systemd-start pre
ExecStart=/usr/sbin/mysqld
ExecStartPost=/usr/share/mysql/mysql-systemd-start post
TimeoutSec=600
Restart=on-failure
RuntimeDirectory=mysqld
RuntimeDirectoryMode=755

想知道可能出了什么问题。任何帮助都将不胜感激。

谢谢