安装

mysql

sudo apt-get --purge remove mysql-server mysql-common mysql-clientsudo apt-get install mysql-server mysql-common mysql-clientmysqladmin -u root password your-new-passwordsudo /etc/init.d/mysql restart

mariadb

apt-get install mariadb-server

字符集修改utf8

如果装的mariadb, 默认字符集已经是utf8了。mysql则不是

mysql> show variables like 'char%';+--------------------------+----------------------------+| Variable_name | Value |+--------------------------+----------------------------+| character_set_client | utf8 || character_set_connection | utf8 || character_set_database | latin1 || character_set_filesystem | binary || character_set_results | utf8 || character_set_server | latin1 || character_set_system | utf8 || character_sets_dir | /usr/share/mysql/charsets/ |+--------------------------+----------------------------+mysql> show variables like 'collation%';+----------------------+-------------------+| Variable_name | Value |+----------------------+-------------------+| collation_connection | utf8_general_ci || collation_database | latin1_swedish_ci || collation_server | latin1_swedish_ci |+----------------------+-------------------+

修改字符集：

sudo vim /etc/mysql/my.cnf

添加以下内容

[mysqld]collation-server = utf8_unicode_ciinit-connect='SET NAMES utf8'character-set-server = utf8

重启：

service mysql restart

登录权限问题

Ubuntu18.04 安装mysql或者mariadb之后，发现普通用户和远程都没有权限连接。

ERROR 1045: Access denied for user: 'root@localhost' (Using
password: YES)

修改了密码也不对。然后sudo mysql -u root即可登录。这显然不是我们想要的。

解决方案

删除root，重新创建用户。

首先，登录

sudo mysql -u root

然后查看当前用户

SELECT User,Host FROM mysql.user;+------------------+-----------+| User | Host |+------------------+-----------+| admin | localhost || debian-sys-maint | localhost || magento_user | localhost || mysql.sys | localhost || root | localhost |

删除root账号

mysql> DROP USER 'root'@'localhost';Query OK, 0 rows affected (0,00 sec)

重新创建root：

mysql> CREATE USER 'root'@'%' IDENTIFIED BY '123456';Query OK, 0 rows affected (0,00 sec)

授权

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION;Query OK, 0 rows affected (0,00 sec)mysql> FLUSH PRIVILEGES;Query OK, 0 rows affected (0,01 sec)

关于重置密码

host为%时允许远程登录

SET PASSWORD FOR root@'localhost' = PASSWORD('password');

or

UPDATE mysql.user SET Password=PASSWORD('newpwd') WHERE User='root';

or

USE mysqlUPDATE user SET Password = PASSWORD('newpwd')WHERE Host = 'localhost' AND User = 'root';

允许任何地方登录

USE mysqlUPDATE user SET Password = PASSWORD('newpwd')WHERE Host = '%' AND User = 'root';

参考
https://askubuntu.com/questions/766334/cant-login-as-mysql-user-root-from-normal-user-account-in-ubuntu-16-04
https://help.ubuntu.com/community/MysqlPasswordReset

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。