完全原创，自己写的一个脚本，Nginx前20个访问IP的抓取，执行脚本后，会不断的提取日志，直接你输入0后才会停止，否则会一直循环下去，时间可以自己定，脚本如下：

#!/bin/bash

# date 2013-04-24 # Liuyang # nginx log file directory nginxlogdir="/opt/server/nginx/logs" nginxlog="$nginxlogdir/data.zgzcw.com.access.log" #Start collecting log start_time=$(date +"%F %X") factorial=1 echo "Start time:$start_time" tail -f  $nginxlog | awk '{ print $1 }' > /root/nginx.log & while [ "$factorial" -le 10 ] do     echo "please input the stop number:[0]"     stty -echo     read num     stty echo     if [ $num == 0 ]; then         ps aux | grep "tail -f $nginxlog" | grep -v grep | awk '{ print $2 }' | xargs kill -9         factorial=11     fi done stop_time=$(date +"%F %X") echo " " echo "Stop time: $stop_time" echo " " echo "$start_time   ~    $stop_time" echo " " #Most visted 20 IP echo "Most visted 20 IP:" printf "Frequency    IP\n" cat /root/nginx.log |grep -v - | awk '{ print $1 }' | sort -n|uniq -c|sort -nr \                    |head -20 | sed 's/^ *//g' | awk 'BEGIN {FS=" "}{printf("%d\t%s\n",$1,$2)}'