Xen VMs won’t start: “Cannot plug VIF”

I've been unable to solve this problem for a few weeks now, so i'll try posting it to my blog – maybe someone out there knows the answer.  Would very much appreciate a clue on this one. I've got a VM on a citrix xenserver 5.0.0 machine that won't start. it was running fine until it was rebooted on a Fri afternoon, a few weeks ago. Starting it from the (windows-only) xencenter GUI results in: "This VM cannot be started, …

Introduction to Linux Signals 101

or ^C doesn’t kill processes, SIGINT does On the LUV mailing list recently, the perils of tty handling when booting with “init=/bin/bash” came up, and somebody asked why running ‘ping’ (without remembering to run stty or openvt first) will result in you having to reboot. i.e. “why doesn’t ^C work in emergency mode”? I wrote a fairly detailed, but comprehensible to a novice, answer and a friend suggested i should have written it as a blog post – which was …