[转]Mariadb的root密码忘记后的解决方法

环境背景：CentOS 7.2

一、编辑/usr/lib/systemd/system/mariadb.service 文件，在Service段中添加

[Service]

Type=simple

User=mysql

Group=mysql

User=mysql

Group=mysql

ExecStartPre=/usr/libexec/mariadb-prepare-db-dir %n

# Note: we set --basedir to prevent probes that might trigger SELinux alarms,

# per bug #547485

#在Server段中的ExecStart出添加如下

ExecStart=/usr/bin/mysqld_safe --basedir=/usr --skip-grant-tables --skip-networking

二、键入systemctl daemon-reload使其立即生效

1	`[root@node1 ~]# systemctl daemon-reload`

三、重新启动mariadb服务并使用mysql联入

[root@node1 ~]# systemctl restart mariadb.service

[root@node1 ~]# mysql

Welcome to the MariaDB monitor. Commands end with ; or \g.

Your MariaDB connection id is 2

Server version: 5.5.44-MariaDB MariaDB Server

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]>

四、更改root用户的密码

MariaDB [(none)]> UPDATE mysql.user SET Password=PASSWORD('xiaoshui') WHERE user='root' and host='localhost';

Query OK, 0 rows affected (0.00 sec)

Rows matched: 1 Changed: 0 Warnings: 0

MariaDB [(none)]> FLUSH PRIVILEGES;

Query OK, 0 rows affected (0.00 sec)

五、退出并关闭mariadb服务并把/usr/lib/systemd/system/mariadb.service文件中刚刚添加的那两行移除

1 2	`ExecStart=/usr/bin/mysqld_safe` `--basedir=/usr` `ExecStartPost=/usr/libexec/mariadb-wait-ready` `$MAINPID`

六、启动mariadb服务，并使用新设置的密码连接

[root@node1 ~]# mysql -u root -h localhost -p

Enter password:

Welcome to the MariaDB monitor. Commands end with ; or \g.

Your MariaDB connection id is 4

Server version: 5.5.44-MariaDB MariaDB Server

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]>

巴特西