: What means the part between the date and the server answer in Apache’s log? I have in the log file a following line: xxx.xxx.xxx.xxx;[05/Aug/2016:00:00:48 +0200];GET /extensions/css/example.css?rev=example

@Caterina187

The first URL should be the file that is access, while the second one is the referrer, aka the file/page that made the browser access the first URL.

You can configure what shows up in your log files. Typically by modifying the 'LogFormat' lines in your /etc/apache2/apache2.conf
More information about what information you can show: httpd.apache.org/docs/current/mod/mod_log_config.html

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@Goswami781

Assuming you are talking about GET /extensions/css/example.css?rev=example

The log is telling you that on the page www.example.com/page.html a GET request was made of /extensions/css/example.css with the key being rev and the data being example

If you aren't familiar with querystrings, the URL is passing data to the file it is requesting. Assuming there is some code to parse the data something will happen if rev=example. Something different might happen if rev=production (for instance).

You can also POST data to a page to modify the result, in this case it doesn't appear in the URL and usually done via a form.

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