mysql-serverのパッケージを更新したらなんかメッセージ出た

なんだこれは

$ mysql -u root
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
$ sudo /etc/init.d/mysql status
MySQL is stopped..
$ sudo /etc/init.d/mysql start
Starting MySQL database server: mysqld.
Checking for corrupt, not cleanly closed and upgrade needing tables..

起動して動いているが