Where can i find varnish log files? /var/log/varnish is empty

loggingvarnish

I'm trying to read log files of Varnish server in Ubuntu environment.

I actually never used Varnish before.

so…I cd to /var/log/varnish, but the folder is empty.

it tells me that I have to configure my varnish server to save logs…is that true?

Best Answer

by default varnish will not log anywhere.. you have to run a command to get it to show logs

You can run the command

varnishncsa

For more info on how to use that command to write to a log instead of stdout

http://www.go2linux.org/linux/2011/05/configure-varnish-logs-varnishnsca-logrotate-and-awstats-1014

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Linux – lastb: /var/log/btmp empty

I think this is a problem with openssh. I tested this on an Ubuntu system and bad ssh login attempts get logged to /var/log/auth.log but not to btmp. At the console, bad login attempts do go to btmp.

In Google searches, I'm seeing reports of this going back to 2006-2007.

Linux – proper way to clear logs

You can use:

> /var/log/mail.log

That will truncate the log without you having to edit the file. It's also a reliable way of getting the space back.

In general it's a bad thing to use rm on the log then recreating the filename, if another process has the file open then you don't get the space back until that process closes it's handle on it and you can damage it's permissions in ways that are not immediately obvious but cause more problems later on.

Yasar has a nice answer using truncate

Also if you are watching the contents of the log you might like to use the tail command:

tail -f /var/log/mail.log

Ctrl-C will break off the tailing.

Best Answer

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Linux – lastb: /var/log/btmp empty

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