Ubuntu18.04(linux)安装MySQL的方法步骤
安装
mysql
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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
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mariadb
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apt-get install mariadb-server
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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
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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/ |
+ --------------------------+----------------------------+
|
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mysql> show variables like 'collation%' ;
+ ----------------------+-------------------+
| Variable_name | Value |
+ ----------------------+-------------------+
| collation_connection | utf8_general_ci |
| collation_database | latin1_swedish_ci |
| collation_server | latin1_swedish_ci |
+ ----------------------+-------------------+
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修改字符集:
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sudo vim /etc/mysql/my .cnf
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添加以下内容
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[mysqld]
collation-server = utf8_unicode_ci
init-connect='SET NAMES utf8'
character-set-server = utf8
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重启:
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service mysql restart
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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
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sudo mysql -u root
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然后查看当前用户
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SELECT User ,Host FROM mysql. user ;
+ ------------------+-----------+
| User | Host |
+ ------------------+-----------+
| admin | localhost |
| debian-sys-maint | localhost |
| magento_user | localhost |
| mysql.sys | localhost |
| root | localhost |
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删除root账号
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mysql> DROP USER 'root' @ 'localhost' ;
Query OK, 0 rows affected (0,00 sec)
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重新创建root:
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mysql> CREATE USER 'root' @ '%' IDENTIFIED BY '123456' ;
Query OK, 0 rows affected (0,00 sec)
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授权
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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)
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关于重置密码
host为%
时允许远程登录
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SET PASSWORD FOR root@ 'localhost' = PASSWORD ( 'password' );
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or
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UPDATE mysql. user SET Password = PASSWORD ( 'newpwd' ) WHERE User = 'root' ;
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or
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USE mysql
UPDATE user SET Password = PASSWORD ( 'newpwd' )
WHERE Host = 'localhost' AND User = 'root' ;
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允许任何地方登录
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USE mysql
UPDATE user SET Password = PASSWORD ( 'newpwd' )
WHERE Host = '%' AND User = 'root' ;
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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。
原文链接:https://www.cnblogs.com/woshimrf/p/ubuntu-install-mysql.html
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