Useful commands to parse access.log

check_access.logs

# Sort access by Response Codes
awk -F\" '{print $2}' access.log | awk '{print $2}' | sort | uniq -c | sort -r

# Combined
awk '{print $9}' access.log | sort | uniq -c | sort
Example:
      4 405
     19 503
    564 500
   1013 103
   1479 206
   1541 403
   2137 401
   4914 404
  10167 301
  17121 304
  43591 302
 998653 200
 
 
 # Most 404 Errors 

grep "HTTP/1.1\" 404" access_log | awk '{print $7 } ' | sort | uniq -c | sort -n