debian 7不能停止mysqld解决办法

在debian 7下面安装了nginx+mysql+php，结果出现

Starting MySQL database server: mysqld . . . . . . . . . . . . . . failed!

/etc/init.d/mysql restart
Stopping MySQL database server: mysqld failed!
Starting MySQL database server: mysqld already running.

然后尝试

pkill -9 mysql

结果好了

# pkill -9 mysql
# /etc/init.d/mysql restart
Stopping MySQL database server: mysqld.
Starting MySQL database server: mysqld.
Checking for corrupt, not cleanly closed and upgrade needing tables..