Disable Hibernation in Ubuntu / Edubuntu

I just mentioned one of the big problems we discovered was that hibernating the client would cause the server to hibernate or sleep. To discover how to disable hibernation, I thought the quickest way would be to jump on the the freenode channel of Edubuntu, irc://freenode/edubuntu, then the much more active Ubuntu one, irc://freenode/edubuntu. On the Edubuntu one, I discovered that I had to change a hibernate setting in gnome-power-manager. The Ubuntu one helped me locate it; I had to enter gconf-editor in the terminal, find gnome-power-manager, and then uncheck can_hibernate. One problem solved thanks to the support from the community!

Potential Problems and Stuff to Still Work On

As mentioned in my last post, the thin clients and server work very well. In fact, I am writing this post from my laptop which is functioning as a thin client and also allows me to do administrative stuff without actually being at the server’s keyboard and monitor. However, Brian and I discussed some stuff we have to work on during lunch. One major thing we found accidentally was that selecting hibernate from a thin client actually hibernated the server……very bad. The other which should be a simple line of code in a config file is the use of cds and flash drives at the clients.  Some things we still have to work on is perfecting user accounts and doing performance tests making sure things work when multiple applications are being used at multiple stations.

DHCP and Internet with an Edubuntu LTSP Server

We received a network switch to allow us to have an ltsp server and thin clients, which worked fine. However, we were told to keep the switch off the network. We need the internet to update the server and so we added another NIC (network interface card) to the server, and changed the configuration so the new NIC was set to DHCP, and the old one maintained the static ip and was the DHCP server for the thin clients. However, this did not allow us to access the internet. In addition, every time we restarted, the new NIC would change between eth1 and eth2 in the network manager. I edited the interface file (sudo gedit /etc/network/interfaces) through the terminal, and commented out every mention of eth2. This did not alleviate the problem, therefore, I turned to a guide I had read before, here. I just had to make one modification, instead of /etc/default/dhcp, which did not exist, I edited /etc/default/dhcp3-server like the guide said, making eth0 the default for serving DHCP requests. After this, the internet works fine and the thin clients work as well. Even better, the thin clients receive internet, and we manage to separate the switch from the network.