Mariadb初始登陆报错 ERROR 1045 (28000) 的解决办法

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今天，测试环境下需要使用到mysql数据库;于是我使用yum安装方式快速部署了mariadb。使用的Linux系统版本为CentOS 7.x。   安装完成后，我很自然的使用mysql命令登陆，因为是刚安装的初始环境，结果报错了:

1 2	[iyunv@node ~]# mysql ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

  第一次碰到这种情况。我检查了配置文件，没发现异常，另外yum安装,也是初始环境，应该不会有问题。无奈只能上网找找相关的案例试试。
  还好，最后成功的解决了此问题。
  解决步骤如下:
1,首先停掉数据库服务:

1	[iyunv@node ~]# systemctl stop mariadb.service

2,使用mysqld_safe来启动mysqld服务器:

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[iyunv@node ~]# mysqld_safe --user=mysql --skip-grant-tables --skip-networking & [1] 4120 [iyunv@node ~]# 170301 11:04:57 mysqld_safe Logging to '/var/log/mariadb/mariadb.log'. 170301 11:04:57 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql

3,登录:

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[iyunv@node ~]# mysql -u root mysql Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Welcome to the MariaDB monitor.  Commands end with ; or \g. Your MariaDB connection id is 1 Server version: 5.5.52-MariaDB MariaDB Server Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [mysql]>

4,修改root用户密码:

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MariaDB [mysql]> UPDATE user SET PASSWORD=PASSWORD('newpassword') where USER='root'; Query OK, 4 rows affected (0.00 sec) Rows matched: 4  Changed: 4  Warnings: 0 MariaDB [mysql]> FLUSH PRIVILEGES; Query OK, 0 rows affected (0.00 sec) MariaDB [mysql]> QUIT Bye [iyunv@node ~]#

5,使用修改后的root用户和新密码newpassword登录数据库:

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[iyunv@node ~]# mysql -uroot -p Enter password: Welcome to the MariaDB monitor.  Commands end with ; or \g. Your MariaDB connection id is 6 Server version: 5.5.52-MariaDB MariaDB Server Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]>

到此，该问题成功解决！