On 13/10/2013 01:51, Ralf Mardorf wrote: > yesterday I rebooted at 17:51 from linux 3.11.4-1 to linux-rt > 3.10.14_rt9-1 and then shut down at 17:55. > > How can I get log data, kernel messages of this startup? To get log data from a specific startup, as root/using sudo, run: # journalctl -b -1 "_TRANSPORT=kernel" where "-b -1" means the previous boot ("-b -2" meaning the boot before and so on). You can also use: # journalctl -b -0 "_TRANSPORT=kernel" to show current boot messages, which is equivalent to: # journalctl -k Tim