"Apache2 logs are usually found in /var/log/apache2"

Carl, you were right. There are two main errors, and I think it's related to 
RAM.

(12)Cannot allocate memory: couldn't create child process: 12: index.cgi
(12)Cannot allocate memory: couldn't spawn child process: 
/usr/share/backuppc/cgi-bin/index.cgi

And then some other bits about the referrer.

Does it sound like a RAM problem? This is Ubuntu 10.04 running on a fairly 
low-end machine (the only spare one we had). 2 GHz Celeron, 1 GB of RAM, just 
over 2 TB of hard drive space.


Yes, you are out of RAM (and swap), but perhaps other processes are
using it. Run 'top' and look for big numbers in the virt, res, and
%mem columns. 

--------------------------

Right now, the process with the highest percentage of memory is single digits. 
I'm not having the problem right now, it's usually just while backing up. When 
it happens again, I'll run top to see which one it is.

I thought 1 GB would be enough? Or do I just need a larger swap file/partition?

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