运行环境
ubuntu 18.04
mysql 5.7
卸载
sudo apt-get autoremove --purge mysql-server-5.7
sudo apt-get remove mysql-server
sudo apt-get autoremove mysql-server
sudo apt-get remove mysql-common
sudo rm -rf /etc/mysql/ /var/lib/mysql #很重要
清理残留数据
dpkg -l |grep ^rc|awk '{print $2}' |sudo xargs dpkg -P
sudo apt autoremove
sudo apt autoclean
安装
apt-get install mysql-server
apt-get install mysql-client
apt-get install libmysqlclient-dev
使用
启动服务
sudo /etc/init.d/mysql start
登录
查看可以登录的用户名密码
sudo cat /etc/mysql/debian.cnf
记住里面的user和password对应的值，然后进行登录
mysql -u debian-sys-maint -p
输入密码：......
use mysql;
select user, plugin from user;
如果root的plugin字段是’auth_socket‘ 修改语句：
update user set plugin='mysql_native_password' where user='root';
修改密码
update user set authentication_string=password('123456') where user='root';
刷新mysql权限
flush privileges;
新密码登录
mysql -u root -p
开启远程权限
mysql>GRANT ALL PRIVILEGES ON . TO 'root'@'%' IDENTIFIED BY '123456' with grant option;
mysql> FLUSH PRIVILEGES;
修改mysql配置文件
(1) vim /etc/mysql/mysql.conf.d/mysqld.cnf
(2)将bind-address = 127.0.0.1修改为bind-address = 0.0.0.0
(3)保存退出esc :wq
(4)/etc/init.d/mysql restart (一定要重启数据库,不然没用)
可视化界面安装（workbench）
sudo apt-get install mysql-workbench
命令行输入mysql-workbench就可以启动
