Ubuntu安装mysql5.7

1. oracle官网下载mysql的deb-bundle.tar
2. 解压tar包，按顺序安装
   mysql-common_5.7.13-1ubuntu16.04_amd64.deb
   mysql-community-client_5.7.13-1ubuntu16.04_amd64.deb
   mysql-client_5.7.13-1ubuntu16.04_amd64.deb
   mysql-community-server_5.7.13-1ubuntu16.04_amd64.deb
   安装mysql server时产生软件依赖问题：
   mysql-community-server depends on apparmor; however:
   Package apparmor is not installed.
   mysql-community-server depends on libmecab2 (>= 0.996-1.2ubuntu1); however:
   Package libmecab2 is not installed.
   那就先安装上：
   sudo apt -get install libmecab2
   然后mysql-community-server，mysql-server就能正常使用了