一、安裝命令
sudo apt install mysql-server
# 查看mysql安裝狀態
sudo service mysql status
二、配置文件的問題
1、配置文件的位置： /etc/mysql
debian.cnf: 保存着賬號信息
my.cnf: 指出實際配置文件的位置：/etc/mysql/mysql.conf.d/
mysqld.cnf: 實際的配置信息
2、其他文件位置
/usr/bin 客戶端程序和腳本
/usr/sbin mysqld 服務器
/var/lib/mysql 日志文件，數據庫 ［重點要知道這個］
/usr/share/doc/packages 文檔
/usr/include/mysql 包含( 頭) 文件
/usr/lib/mysql 庫
/usr/share/mysql 錯誤消息和字符集文件
/usr/share/sql-bench 基准程序
三、初始密碼的問題
１、root用戶的狀態
２、更改root用戶的密碼
在更改密碼的同時，還修改user表中的plugin字段為‘mysql_native_password’，該字段的作用還不太明了，看官網說明，大概是密碼的驗證方式之類的。但不改這個直接修改密碼好像還不成功。
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'yourpassword';
3、新添加用戶並授權
create user 'admin'@'%' identified by '123';
grant all on * to 'admin'@'%' with grant option;
alter user 'admin'@'%' identified with mysql_native_password by '456';
四、msyqlclient的安裝問題
- mysqlclient安裝不成功主要缺少兩個包：
sudo apt-get install libmysqlclient-dev libpython3.8-dev
- 如果還有錯，那就把wheel裝上：
pip install wheel
五、卸載的問題
Removing MySQL with APT
- To uninstall the MySQL server and the related components that have been installed using the MySQL APT repository, first, remove the MySQL server using the following command:
shell> sudo apt-get remove mysql-server
- Then, remove any other software that was installed automatically with the MySQL server:
shell> sudo apt-get autoremove
- To uninstall other components, use the following command, replacing package-name with the name of the package of the component you want to remove:
shell> sudo apt-get remove package-name
- To see a list of packages you have installed from the MySQL APT repository, use the following command:
shell> dpkg -l | grep mysql | grep ii
六、遇到的坑
mysql> show tables;
ERROR 1449 (HY000): The user specified as a definer ('mysql.infoschema'@'localhost') does not exist
mysql> show databases;
ERROR 1449 (HY000): The user specified as a definer ('mysql.infoschema'@'localhost') does not exist
- 第一步，停止MySql服務
service mysql stop
- 第二步，用mysqld對MySql的一些文件進行升級
sudo mysqld --upgrade=FORCE