I just installed Munin on Ubuntu 12.04. I had used it previously on a different machine running 10.04 and it has a beautiful memory graph. For some reason it is not showing up on my new install. Any ideas where to look?
Ok, figured it out. There's a huge list of plugins in /usr/share/munin/plugins. I just ran:
ln -s /usr/share/munin/plugins/memory memory
sudo restart munin-node
Showed up right away.