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Extract referers from Apache logs

Last updated on October 21, 2014

This quick awk one-liner (tested on Linux) will extract all referer (referrer) entries from a combined Apache log file (called LOGFILE) excluding entries such as “”, “-“, (empty) and ones containing DOMAIN. Useful if you want to check where external referers are coming from
awk '($11 !~ /^"?-?"?$/ && $11 !~ /DOMAIN/) {print $11}' LOGFILE