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Systemlogviewer in Ubuntu states that btmp is no usual file that can be opened. I don't know what happened. Some hours ago this problem hasn't yet occured? how can i fix it. when i delete btmp file. is there automatically created a new one? I'm a very newbie with logging and internals in ubuntu and linux. Please advice me step by step what to do to fix it?

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Use last to read the binary file with the -f flag. btmp logs failed authentication attempts.

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ok, but how do i get rid of the notification in ubuntus log file viewer, some time ago this error didn't popup? – user56548 Oct 9 '10 at 16:19
Seems to be a confirmed bug for a longer time now in Gnome Utils – user56548 Oct 9 '10 at 16:32

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