In order to create daily mysql and ldap backup you can put this small script in ''/etc/cron.daily/'':

<code bash>
#!/bin/bash 

mkdir -p /srv/backup
mysqldump -uroot -p"$(sudo cat /etc/yunohost/mysql)" mysql > /srv/backup/backup-$(date +"%m-%d-%y").mysql
slapcat > /srv/backup/backup-$(date +"%m-%d-%y").ldap
find /srv/backup -mtime +10 -exec rm {} \;
chown root. /srv/backup
chmod -R 740 /srv/backup
</code>

Make the script executable

<code bash>
chmod +x /etc/cron.daily/backup
</code>

This script save all your databases and your ldap in ''/srv/backup'' for the last 10 days.