Mariadb的root密码忘记后的解决方法

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环境背景：CentOS 7.2

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

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[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	[iyunv@node1 ~]# systemctl daemon-reload

三、重新启动mariadb服务并使用mysql联入

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[iyunv@node1 ~]# systemctl restart mariadb.service [iyunv@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 Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others. 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

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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

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[iyunv@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 Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]>

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