install Mysql 5 on Ubuntu20

select myql 5.7

wget wget https://dev.mysql.com/get/mysql-apt-config_0.8.12-1_all.deb
dpkg -i mysql-apt-config_0.8.12-1_all.deb


turns off the GPG check

sources.list.d/mysql.list

deb [trusted=yes] http://repo.mysql.com/apt/ubuntu/ bionic mysql-5.7

install mysql and create admin user

sudo apt update
apt-cache policy mysql-server | grep 5.7
sudo apt install  mysql-client=5.7.37-1ubuntu18.04  mysql-community-server=5.7.37-1ubuntu18.04
mysql -u root -p
GRANT ALL PRIVILEGES ON *.* TO 'admin'@'%' IDENTIFIED BY 'pass' WITH GRANT OPTION