怎么在Ubuntu18.04环境中安装MySQL
怎么在Ubuntu18.04环境中安装MySQL?相信很多没有经验的人对此束手无策,为此本文总结了问题出现的原因和解决方法,通过这篇文章希望你能解决这个问题。
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安装
mysql
sudo apt-get --purge remove mysql-server mysql-common mysql-client sudo apt-get install mysql-server mysql-common mysql-client mysqladmin -u root password your-new-password sudo /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_ci init-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 mysql UPDATE user SET Password = PASSWORD('newpwd') WHERE Host = 'localhost' AND User = 'root';
允许任何地方登录
USE mysql UPDATE user SET Password = PASSWORD('newpwd') WHERE Host = '%' AND User = 'root';
看完上述内容,你们掌握怎么在Ubuntu18.04环境中安装MySQL的方法了吗?如果还想学到更多技能或想了解更多相关内容,欢迎关注创新互联行业资讯频道,感谢各位的阅读!
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