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I've been getting "Disk IO rate warning" emails from Linode - and it looks like it's happening every 7 days. I have a few websites being hosted there and I realise that there are some APIs that I didn't secure.

What is the best way to check who (or what) has been accessing which resource on my server?

I'm using Ubuntu.

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migrated from security.stackexchange.com May 9 '13 at 15:41

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1 Answer 1

This is a very broad subject, but you could do some auditing by lining up high levels of I/O with entries in log files in /var/log. Also, if these times are predictable, you can use iotop at the time to see what is performing I/O.

For more general use, consider installing tools like logwatch, chkrootkit, rkhunter.

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