Admin
Bits n' bobs related to web server admin and maintenance.
• Apache Sub Directory Log Filter
If your website sits under a subdirectory of a larger website, then A LOT of the server's logs are
not that relavent to your site. This one liner can be used to filter out all the logs that are
not important, leaving entries related to your site, and with the parent directories removed from
the request path.
To use, replace the text /some/where (keeping the ^) with the path to your site, and adjust the second
argument in the substr function (currently 12) to the length of the path text + 1. Running the command
redirects the filtered logs to a file called filtered.
> awk '{ if ($7 ~ "^/some/where" ) { $7=substr($7,12,length($7)); \
print $0 } }' access_log > filtered
Note: This command relies on the 7th column in the log file containing the requested
resource, i.e. the page/image/file being fetched from the server. If your server is set to log differently
then you'll need to change the column number awk is checking.
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