MySql的安装及配置

安装命令：

sudo apt-get install mysql-server-5.7

不能下载（下载报错）（更换源163或者腾讯源）
换源操作：

备份：

sudo cp /etc/apt/sources.list /etc/apt/sources.list_bk

编辑：

sudo gedit /etc/apt/sources.list#或者 sudo vim /etc/apt/source.list

添加源（163源）：

deb http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse

更新：

sudo apt-get update

参考链接：https://blog.csdn.net/rrrrr11111jjjjjj/article/details/117045738
安装完成：

mysql --version #查看版本

MySQL相关设置：
先查看密码：

sudo cat /etc/mysql/debian.cnf 

登录MySQL：

mysql -h localhost -u debian-sys-maint -p

输入上述密码后登录：

设置账号密码（以root账号密码为123456为例）

update mysql.user set authentication_string=password('123456') where user='root' and host='localhost';

这步尤其重要：

update mysql.user set plugin='mysql_native_password';

更新：

flush privileges;

退出：

quit;

重启数据库：

sudo service mysql restart

以刚刚设置的账号密码登录数据库：

mysql -h localhost -u root -p123456

show variables like 'character_set_%';

退出：

quit;