Sometimes when running ping, I see the following:
$ ping somehost
PING somehost (192.168.x.x) 56(84) bytes of data.
WARNING: kernel is not very fresh, upgrade is recommended
What causes this warning, and can I ignore it? I'm actually running a relatively new kernel (3.5.0-17-generic).
You can just ignore it, as per http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=120166