On Sunday 04 December 2016 03:10:19 Adam Borowski wrote: > On Sat, Dec 03, 2016 at 10:46:40PM +0100, Marc Joliet wrote: > > As it's a rescue shell, I have only the one shell AFAIK, and it's occupied > > by mount. So I can't tell if there are dmesg entries, however, when this > > happens during a normal running system, I never saw any dmesg entries. > > You can use "open" (might be named "openvt") to spawn a shell on > tty2/tty3/etc. And if you have "screen" installed, Ctrl-a c spawns new > terminals (Ctrl-a n/p/0-9 to switch).
I was actually considering adding tmux to the list of programs in the initramfs after this experience :) . > > The output of sysrq+t is too big to capture all of it (i.e., I can't > > scroll > > back to the beginning) > > You may use netconsole to log everything kernel says to another machine. I > can't provide you with the incantations from the top of my head (got working > serial (far more reliable) on all my dev boxes, and it doesn't work with > bridging ie containers on production), but as your rescue shell has no > network sharing, assuming your network card driver supports a feature > netconsole needs _and_ stars were aligned right when your network card was > manufactured, netconsole is a valuable aid. > > The system might be not dead enough to stop userland network logging from > getting through, too. OK, I'll look up netconsole. > Meow! Thanks -- Marc Joliet -- "People who think they know everything really annoy those of us who know we don't" - Bjarne Stroustrup
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