Centos7 之 MariaDB(Mysql) root密码忘记的解决办法

MariaDB(Mysql) root密码忘记的解决办法

1.首先先关闭mariadb数据库的服务

# 关闭mariadb服务命令(mysql的话命令就是将mariadb换成mysql)

[root@node ~]# systemctl stop mariadb

# 通过进行查询服务或者通过端口查询服务还是否存在

[root@node ~]# ps aux|grep mariadb

root       6852  0.0  0.0 112704   964 pts/2    S+   23:19   0:00 grep --color=auto mariadb

[root@node ~]# netstat -lntup|grep 3306

2.修改配置

修改/etc/my.cnf文件,在[mysqld]下添加 skip-grant-tables , 再启动mysql

# 开启mariadb服务

[root@node ~]# systemctl start mariadb

# 查看服务已经开启

[root@node ~]# ps aux|grep mariadb

mysql      7104  1.1  5.6 972516 80672 ?        Sl   23:22   0:00 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/log/mariadb/mariadb.log --pid-file=/var/run/mariadb/mariadb.pid --socket=/var/lib/mysql/mysql.sock

root       7141  0.0  0.0 112704   964 pts/2    S+   23:22   0:00 grep --color=auto mariadb

# 查看端口也正在使用

[root@node ~]# netstat -lntup|grep 3306

tcp        0      0 0.0.0.0:3306            0.0.0.0:*               LISTEN      7104/mysqld

3.进入数据库并更新密码

# 免密码可进入

root@node ~]# mysql -u root

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

Your MariaDB connection id is 2

Server version: 5.5.60-MariaDB MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

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

# 更新密码

MariaDB [(none)]> update mysql.user set Password=password('123') where User='root';

Query OK, 1 row affected (0.01 sec)

Rows matched: 4  Changed: 1  Warnings: 0

MariaDB [(none)]> flush privileges;

Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> quit;

Bye

4.还原需要密码的配置

# 重新修改为原来配置并重启服务

[root@node ~]# vi /etc/my.cnf

[root@node ~]# systemctl restart mariadb

# 可以看到没有密码现在无法进入

[root@node ~]# mysql -u root

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

# 使用新密码进入mariadb数据库

[root@node ~]# mysql -u root -p

Enter password:

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

Your MariaDB connection id is 3

Server version: 5.5.60-MariaDB MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

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

MariaDB [(none)]> 

同理此问题也可以解决其他linux版本的mariadb(mysql)密码忘记问题