realmd is a DBus based management service that configures membership of realms/domains on the local machine.
realmd documentation: http://www.freedesktop.org/software/realmd/docs/index.html
In order to test realmd with Active Directory, you need the following.
An Active Directory domain to test against. You should have credentials for an administrative account on this domain. For deeper testing you should be able to access the domain and create accounts.
Obviously for real life testing using an already deployed Active Directory domain is desirable. But if you don't have access to an Active Directory domain, here's how to install Windows Server 2008 for free and set one up: http://stef.thewalter.net/2012/08/how-to-create-active-directory-domain.html
Note that the Active Directory will need to be appropriately discoverable via DNS, as it would be "in real life". If DNS is not setup for your Active Directory domain, you can also use steps 8 and 9 in the linked setup instructions above to make DNS work appropriately on your test machine for your domain.
To install realmd from source:
$ sudo yum install realmd
To build and install realmd from source, do something like this:
$ git clone git://anongit.freedesktop.org/realmd/realmd $ cd realmd $ sh autogen.sh --prefix=/usr --sysconfdir=/etc --libdir=/usr/lib64 --enable-debug $ make $ sudo make install $ sudo restorecon -Rv /etc/dbus-1 /usr/bin/realm /usr/lib64/realmd /usr/share/dbus-1 /usr/share/polkit-1
If you wish to later go back to the Fedora 18 version of realmd, just reinstall realmd:
$ sudo yum reinstall realmd