MySQL報錯解決：ERROR! The server quit without updating

報錯：

[root@test leo]# lnmp restart   
+-------------------------------------------+
|    Manager for LNMP, Written by Licess    |
+-------------------------------------------+
|              https://lnmp.org             |
+-------------------------------------------+
Stoping LNMP...
Stoping nginx...  done
ERROR! MySQL server PID file could not be found!
Gracefully shutting down php-fpm . done
Starting LNMP...
Starting nginx...  done
Starting MySQL.. ERROR! The server quit without updating PID file (/tmp/mysql/mysql.pid).    ##啓動數據庫的時候報錯，PID文件丟失，並不能創建成功。
Starting php-fpm  done
[root@test leo]# ps aux |grep mysql
root      17903  0.0  0.0 103324   852 pts/0    S+   10:30   0:00 grep mysql

解決：

[root@test leo]# vim /etc/my.cnf    #修改MySQL的配置文件
[mysqld]
pid-file = /tmp/mysql/mysql.pid     #添加這一行
[root@test leo]# mkdir -p /tmp/mysql
[root@test leo]# chown mysql.mysql  /tmp/mysql    #設置目錄的權限給mysql這個用戶
[root@zuitu leo]# lnmp restart
+-------------------------------------------+
|    Manager for LNMP, Written by Licess    |
+-------------------------------------------+
|              https://lnmp.org             |
+-------------------------------------------+
Stoping LNMP...
Stoping nginx...  done
ERROR! MySQL server PID file could not be found!   ##關閉MySQL服務失敗，因爲MySQL服務根本沒有啓動
Gracefully shutting down php-fpm . done 
Starting LNMP...
Starting nginx...  done
Starting MySQL.. SUCCESS!  ##啓動MySQL服務成功
Starting php-fpm  done
[root@test leo]# netstat -tunlp  |grep mysql
tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN      21188/mysqld        
[root@test leo]#

至此已解決問題，如果數據庫中的數據非常重要的話，請不要參考網上那些初始化數據庫。