You will need some dependancy packages:
sudo apt-get install perl libnet-ssleay-perl openssl libauthen-pam-perl
sudo apt-get install libpam-runtime libio-pty-perl apt-show-versions python
cd ~/
wget http://prdownloads.sourceforge.net/webadmin/webmin_1.610_all.deb
dpkg --install webmin_1.610_all.deb
rm -rf webmin_1.610_all.deb
For remote access open up port 10000. Access it from here:
Users will be the same as your Unix users.
Navigate to https://mydomain.com:10000 and login with your unix username.
Go to Webmin -> Webmin Configuration and select SSL Encryption
Set the private key to:
/etc/ssl/custom/keys/official-www-mydomain-com.key
Set the seperate certificate file to:
/etc/ssl/custom/certs/official-www-mydomain-com.crt
Mark Redirect non-SSL requests to SSL mode? to YES!