Backup all mysql databases to separate dump files

It's easy to just simple do a

mysqldump --alldatabases > mysqlbackup.sql

to backup everything into a large SQL dump, so that you have the inserts there if you have a booboo happening. But what a nightmare you face when you just have to get those lines that affect your recently-crashed site! Well, there's a bit more sophisticated, but much better solution: have each of your database backed up in a separate SQL dump file with the following shell script:

for i in /var/lib/mysql/*/; do
dbname=`basename $i`
/usr/bin/mysqldump $dbname > /home/db_backups
done

Of course you might have to add login parameters to the mysql line above, but that shouldn't be a problem. (Hint: -u myusername --password=mysecretpassword)