ubuntu16安装和卸载mysql5.6

因为ubuntu16 apt-get默认安装是mysql5.7，这里改成安装5.6

apt-get install software-properties-common
sudo add-apt-repository 'deb http://archive.ubuntu.com/ubuntu trusty universe'
sudo apt-get update
sudo apt install mysql-server-5.6
sudo apt install mysql-client-5.6

卸载

sudo apt purge mysql-*
sudo rm -rf /etc/mysql/ /var/lib/mysql
sudo apt autoremove
sudo apt autoreclean