老师叫我有问题解决不了，就来这里跪求. 关于DB2 控制中心乱码

昨天用sudo apt-get install mysql-server安装了mysql，一切正常，今天却发现无法链接数据库了，用sudo /etc/init.d/mysql start启动，提示
Rather than invoking init scripts through /etc/init.d, use the service(8)
utility, e.g. service mysql start

Since the script you are attempting to invoke has been converted to an
Upstart job, you may also use the start(8) utility, e.g. start mysql
start: Job failed to start

用sudo start mysql 提示start: Job failed to start
完全卸载了mysql：
sudo apt-get autoremove --purge mysql-server-5.1
sudo apt-get remove mysql-server
sudo apt-get autoremove mysql-server
sudo apt-get remove mysql-common
再重装，中间可以重设root密码，但还是启动不了。。。。。求教

真无语，又重装了一次，莫名其妙地好了，但我还是不知道原因