For those who do not know what either are, CPanel and Virtualmin are very similar to Plesk. They are a way of managing all your virtual hosting needs if you have a server. You log into a web interface, add a domain and it automagicly reconfigures your server to accept email DNS and websites for it. You can then add email addresses easily and let users manage their own stuff. They make life very easy for those less knowledgeable about Linux and servers in general. Virtualmin is often migrated to as you can download the GPL version entirely free, and it works great. Alternatively you can pay and get a slightly better more featured version.
A nice tip from Jamie of Virtualmin for migration here.
As for migration, once you have the backups from cPanel you can more easily mass-migrate them into Virtualmin from the command line.
You could use a script like :
for file /cpanel/*.gz; do
virtualmin migrate-domain –type cpanel –source $file –pass foo
done
This will migrate all backups in the /cpanel , and give them the password ‘foo’ in Virtualmin. Sadly there is no way to extract the original password from a cPanel backup 🙁