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I'm trying to clear a log file in use, and all the commands I've tried so far:


Don't get the job done. Deleting the file and creating a new file with the same name doesn't work either.

I heard about a config-file for the log but I have no idea where this is kept. Is there ANY way to fix this problem? This log file will get so big it'll crash my system.

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Which log file, and what was the error message? – George Bailey Aug 18 '12 at 19:46

Are there many methods how clear/delete log files. Some of log you can delete, some not and some you can truncate.

For linux system log (such as mail.log for example) I use this method. Steps 1 and 2 are optional, but sometines you need check older logs and backup is sometimes useful. ;-)

  1. Optional: Copy log file

    cp file.log file.log.old
  2. Optional: Use Gzip on copy of log

    gzip file.log.old
  3. Use /dev/null for clean file

    cat /dev/null > file.log
share|improve this answer
Simply > file.log should be enough. No need for cat /dev/null. – muru Oct 12 '14 at 16:45
Thanks, I try remember it for next. ;-) – Oct 12 '14 at 17:10

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