To analyze last system crash I need to find messages prior to current boot. To do so I bruteforce -nX argument. The better way - look message in reverse order from current boot. Or at least - in direct order from last boot
--boot -<n> option added in http://cgit.freedesktop.org/systemd/systemd/commit/?id=a331b5e. It can be combined with --reverse to actually look in reverse order.
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