http://www.nabble.com/Universe-Freeze-is-in-effect-tf2353724.html
https://wiki.ubuntu.com/MOTU/Processes/UVF lists the procedure you need to follow.
http:// www.nabble. com/Universe- Freeze- is-in-effect- tf2353724. html
https:/ /wiki.ubuntu. com/MOTU/ Processes/ UVF lists the procedure you need to follow.