常见日志格式：
$remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for"'
统计 IP 访问次数：
# awk '{a[$1]++}END{for(v in a)print v,a[v]}' access.log
统计访问量大于 100 次的 IP：
# awk '{a[$1]++}END{for(v in a){if(a[v]>100)print v,a[v]}}' access.log
统计访问 IP 次数并排序取前 top10：
# awk '{a[$1]++}END{for(v in a)print v,a[v] |"sort -k2 -nr |head -10"}' access.log
统计某时间段访问最多的 IP：
# awk '$4>="[02/Jan/2017:00:02:00" && $4<="[02/Jan/2017:00:03:00"{a[$1]++}END{for(v in a)print v,a[v]}' access.log
统计上一分钟访问量：
# date=$(date -d '-1 minute' +%d/%d/%Y:%H:%M)# awk -vdate=$date '$4~date{c++}END{print c}' access.log
统计访问最多的 10 个页面：
# awk '!/.js|.css|.png|.gif|.svg|ImageEngine|.jpg|.jpeg|.mp4/{a[$7]++}END{for(v in a) print v,a[v] | "sort -k2 -nr|head -10"}' access.log# awk '{a[$7]++}END{for(v in a)print v,a[v] |"sort -k2 -nr|head -n 10"}’ access.log
统计每个 URL 数量和返回内容总大小：
# awk '{a[$7]++;size[$7]+=$10}END{for(v in a)print a[v],v,size[v]}' access.log
统计每个 IP 访问状态码数量：
# awk '{a[$1" "$9]++}END{for(v in a)print v,a[v]}' access.log
统计访问 IP 是 404 状态次数：
# awk '{if($9~/404/)a[$1" "$9]++}END{for(i in a)print v,a[v]}' access.log
统计访问URL统计PV:
# awk '{print $7}' /usr/local/nginx/logs/access.log|wc -l# awk '{print $1}' access.log|sort|uniq -c
根据访问IP统计UV:
# awk '{print $1}' /usr/local/nginx/logs/access.log|sort | uniq -c |wc -l
查询访问最频繁的IP
# awk '{print $1}' access.log|sort | uniq -c |sort -n -k 1 -r|head -n 50
查询访问最频繁的URL
# awk '{print $7}' access.log|sort | uniq -c |sort -n -k 1 -r|head -n 50
nginx当前并发数
netstat -ant | grep :80 | awk '{print $5}' | awk -F":" '{print $1}'| sort | uniq -c | sort -r -n | awk 'BEGIN{total=0}{total+=$1}END{print total}'
6、查询时间段内的访问日志（404），统计出访问IP及其访问次数
tac access.log | grep "HTTP/1.1\" 404" | awk -v st="15/Oct/2018:14:58:47" -v et="15/Oct/2018:14:59:47" '{t=substr($4,RSTART+2,21);if(t>st && t<=et) {print $0}}' | awk '{print $1}' | sort | uniq -c | sort -nr
其他命令
ls -l|awk 'BEGIN{sum=0} !/^d/{sum+=$5} END{print "total size is",sum}' //计算文件大小
命令使用实例
tac dossier_access_2020-05-14.log | grep "/rest/" | awk -v st="12/May/2020:00:00:01" -v et="13/May/2020:00:00:01" '{t=substr($4,RSTART+2,21);if(t>st && t<=et) {print $0}}' | awk '{print $1}' | sort | uniq -c | sort -nrtac dossier_access_2020-05-14.log | grep "/rest/" | awk -v st="13/May/2020:00:00:01" -v et="14/May/2020:00:00:01" '{t=substr($4,RSTART+2,21);if(t>st && t<=et) {print $0}}' | awk '{print $1}' | sort | uniq -c | sort -nrtac dossier_access_2020-05-14.log | grep "HTTP/1.1\" " | awk -v st="14/May/2020:00:00:01" -v et="15/May/2020:00:00:01" '{t=substr($4,RSTART+2,21);if(t>st && t<=et) {print $0}}' | awk '{print $1}' | sort | uniq -c | sort -nr