众所周知，MySQL的主要版本已经来到了8.0，ubuntu的软件仓库也已经将MySQL的默认版本更新到了8.0，在20.04以上的发行版中，默认软件仓库无法安装MySQL5.7的版本，下面介绍安装方法。
官方安装包下载地址：
https://repo.mysql.com/apt/ubuntu/pool/mysql-5.7/m/mysql-community/
安装前置依赖
apt-get install libaio1 libmecab2 libtinfo5
需要安装的包（按照顺序）
wget https://repo.mysql.com/apt/ubuntu/pool/mysql-5.7/m/mysql-community/mysql-common_5.7.33-1ubuntu18.04_amd64.deb
wget https://repo.mysql.com/apt/ubuntu/pool/mysql-5.7/m/mysql-community/mysql-community-client_5.7.33-1ubuntu18.04_amd64.deb
wget https://repo.mysql.com/apt/ubuntu/pool/mysql-5.7/m/mysql-community/mysql-client_5.7.33-1ubuntu18.04_amd64.deb
wget https://repo.mysql.com/apt/ubuntu/pool/mysql-5.7/m/mysql-community/mysql-community-server_5.7.33-1ubuntu18.04_amd64.deb
dpkg -i mysql-common_5.7.33-1ubuntu18.04_amd64.deb
dpkg -i mysql-community-client_5.7.33-1ubuntu18.04_amd64.deb
dpkg -i mysql-client_5.7.33-1ubuntu18.04_amd64.deb
dpkg -i mysql-community-server_5.7.33-1ubuntu18.04_amd64.deb
开启远程访问
安装完成后修改 /etc/mysql/mysql.conf.d/mysqld.cnf
bind-address = 0.0.0.0