dependencies:
util-linux >= v2.27.1 required
- dbus >= 1.9.14 (strictly speaking optional, but recommended)
+ dbus >= 1.4.0 (strictly speaking optional, but recommended)
NOTE: If using dbus < 1.9.18, you should override the default
policy directory (--with-dbuspolicydir=/etc/dbus-1/system.d).
dracut (optional)