Linux MySQL 安装的基本操作和常见错误

ゞ浴缸里的玫瑰 2022-04-16 02:19 217阅读 0赞

*  **检测系统是否安装MySQL：yum list installed | grep mysql**
 *  **删除MySQL及其依赖：yum remove mysql-community-libs.x86\_64**
 *  **远程在线下载MySQL：wget [https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm][https_dev.mysql.com_get_mysql80-community-release-el7-1.noarch.rpm]**
 *  **在线安装MySQL：yum localinstall mysql80-community-release-el7-1.noarch.rpm**
 *  **显示MySQL仓库列表：yum repolist all | grep mysql**
 *  **显示MySQL enabled仓库列表：yum repolist enabled | grep mysql**
 *  **安装MySQL服务器：yum install mysql-community-server**
 *  **查询MySQL的安装地址：whereis mysql**

mysql: /usr/bin/mysql /usr/lib64/mysql /usr/local/mysql /usr/share/mysql /usr/share/man/man1/mysql.1.gz

*  **查询MySQL的运行文件路径：which mysql**

/usr/bin/mysql

*  **启动MySQL：service mysqld start**
 *  **开机启动MySQL**

systemctl enable mysqld

systemctl daemon-reload

*  **生成一个临时密码：grep 'temporary password' /var/log/mysqld.log**
 *  **到/var/log/mysqld.log查看临时密码**
 *  **执行sql语句报错：Table 'mysql.role\_edges' doesn't exist则升级数据库：mysql\_upgrade -u root -p并重启mysqld服务**
 *  **修改账户密码：alter user 'root'@'localhost' identified by 'New Password';**
 *  **新建一个访问数据库的用户：create user 'user'@'%' identified by 'password';**
 *  **赋予新用户操作数据库的所有权限： grant all privileges on \*.\* to 'user'@'%'**
 *  **查看自身权限：show grants**
 *  **查看其它用户权限：show grants for OtherUser@'%'**
 *  **查看表结构：desc table\_name;**
 *  **给文件夹添加用户权限：chown mysql:mysql -R /var/lib/mysql **
 *  **数据库服务启动错误：使用rpm包安装的数据库**

service mysqld restart

错误：Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.

systemctl start mysqld.service

错误：Failed to start mysql.service: Unit not found.

解决方法：rm -rf /var/lib/mysql/\*

错误原因：MySQL在初始化时会检测数据目录是否存在，如若不存在则MySQL会创建，如若存在且该目录里有数据则会报错，并且终止初始化

*  **client does not support authentication protocol requested by server;consider upgrading mysql client错误**

alter user 'user'@'%' identified with mysql\_native\_password by 'password';

[https_dev.mysql.com_get_mysql80-community-release-el7-1.noarch.rpm]: https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm