Can't get mysql running
1 - What message do you get when you try to restart mysql ? : /etc/init.d/mysql restart

2 - Verify if the /var/run/mysqld directory is owned by mysql, if it's not th case, create a new directoy and assign it to mysql :

sudo mkdir /var/run/mysqld
sudo chown mysql:mysql mysqld


And restart the mysqld daemon :

sudo mysqld_safe