There are many Apache log analyzers that you can now choose from, but it can be long or confusing to install most of them. I wanted to try and find a simple log analyzer that just does its work using cronjobs. Visitors seems to fit the needs!
We'll also use ip2host to resolve the IP addresses into domain names.
All of this will be run daily by a cronjob.

Screenshot of a report generated by Visitors

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scanerrlog offers the possibility to generate a summary or report about Apache errors and sort them depending on how frequent they are.

To install it (for Ubuntu users):

sudo apt-get install scanerrlog

or use Synaptic and search for scanerrlog.

It's written in Python, and it is very easy to use it. (type 'man scanerrlog' in a terminal to see the manual page)

I tested it with Apache2 log files using the following command:

scanerrlog -f text -o /tmp/log.txt /var/log/apache2/*.log

• -f : format (text, pdf, html, xml)
• -o : output file
• args : log files

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