Forked from hvelarde/web server log analysis cheat sheet
Created
October 11, 2018 15:16
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# get total requests by status code | |
awk '{print $9}' /var/log/nginx/access.log | sort | uniq -c | sort -rn | |
# get top requesters by IP | |
awk '{print $1}' /var/log/nginx/access.log | sort | uniq -c | sort -rn | head | |
# get top requesters by user agent | |
awk -F'"' '{print $6}' /var/log/nginx/access.log | sort | uniq -c | sort -rn | head | |
# get top requests by URL | |
awk '{print $7}' /var/log/nginx/access.log | sort | uniq -c | sort -rn | head | |
# get top IP addresses requesting non-existent content | |
awk '$9 ~ /404/ {print $1}' /var/log/nginx/access.log | sort | uniq -c | sort -rn | head | |
# get top URL returning 404 Not Found | |
awk '$9 ~ /404/ {print $7}' /var/log/nginx/access.log | sort | uniq -c | sort -rn | head | |
# get top user agents requesting non-existent content | |
awk '$9 ~ /404/' /var/log/nginx/access.log | awk -F'"' '{print $6}' | sort | uniq -c | sort -rn | head | |
# get top IP addresses causing backend errors | |
awk '$0 ~ /\[error\]/ && match($0, /(client: )(.*)(, server)/, arr) {print arr[2]}' /var/log/nginx/error.log | sort | uniq -c | sort -rn | |
# get slower requests by URL (ignoring requests using POST method) | |
awk -F'rt=' '$0 !~ /POST/ && substr($2,0,5) > 5' /var/log/nginx/access.log | awk '{print $7}' | sort | uniq -c | sort -rn | head |
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