ubuntu16.04安装mysql5.61，先删除数据库先完全删除MySQL数据库按照Ubuntu16.04完全删除数据库2，安装apt-getinstallsoftware-properties-commonsudoadd-apt-repository'debhttp://archive.ubuntu.com/ubuntutrustyuniverse'sudoapt-getupdatesudoaptinstallmysql-server-5.6sudoaptinstallmysql-client-5.6
