标签:awk 日常工作总结
一.Linux 系统连接状态篇;
1、查看TCP连接状态;
netstat -nat |awk ‘{print $6}‘|sort|uniq-c|sort -rn netstat -n | awk ‘/^tcp/ {++S[$NF]};END {for(ain S) print a, S[a]}‘ 或 netstat -n | awk ‘/^tcp/ {++state[$NF]}; END{for(key in state) print key,"t",state[key]}‘ netstat -n | awk ‘/^tcp/ {++arr[$NF]};END{for(k in arr) print k,"t",arr[k]}‘ netstat -n |awk ‘/^tcp/ {print $NF}‘|sort|uniq-c|sort -rn netstat -ant | awk ‘{print $NF}‘ | grep -v ‘[a-z]‘| sort | uniq -c
2.查找请求数请20个IP(常用于查找攻来源);
netstat -anlp|grep 80|grep tcp|awk ‘{print$5}‘|awk -F: ‘{print $1}‘|sort|uniq -c|sort -nr|head -n20 netstat -ant |awk‘/:80/{split($5,ip,":");++A[ip[1]]}END{for(i in A) print A[i],i}‘|sort -rn|head -n20
3.使用tcpdump嗅探80端口的访问看看谁最高;
tcpdump -i eth0 -tnn dst port 80 -c 1000 | awk-F"." ‘{print $1"."$2"."$3"."$4}‘ |sort | uniq -c | sort -nr |head -20
4、查找较多time_wait连接;
netstat -n|grep TIME_WAIT|awk ‘{print$5}‘|sort|uniq -c|sort -rn|head -n20
5、找查较多的SYN连接;
netstat -an | grep SYN | awk ‘{print $5}‘ | awk-F: ‘{print $1}‘ | sort | uniq -c | sort -nr | more
6、根据端口列进程;
netstat -ntlp | grep 80 | awk ‘{print $7}‘ |cut -d/ -f1
二.网站日志分析篇;
1.apache 日志(获得访问前10位的ip地址);
cat access.log|awk ‘{print $1}‘|sort|uniq-c|sort -nr|head -10 cat access.log|awk ‘{counts[$(11)]+=1}; END{for(url in counts) print counts[url], url}‘
2.访问次数最多的文件或页面,取前20;
cat access.log|awk ‘{print $11}‘|sort|uniq-c|sort -nr|head -20
3.列出传输最大的几个exe文件(分析下载站的时候常用);
cat access.log |awk ‘($7~/.exe/){print $10" " $1 " " $4 " " $7}‘|sort -nr|head -20
cat access.log |awk ‘($10 > 200000&& $7~/.exe/){print $7}‘|sort -n|uniq -c|sort -nr|head -100
5.如果日志最后一列记录的是页面文件传输时间,则有列出到客户端最耗时的页面
cat access.log |awk ‘($7~/.php/){print $NF " " $1 " " $4 " " $7}‘|sort-nr|head -100
cat access.log |awk ‘($NF > 60 &&$7~/.php/){print $7}‘|sort -n|uniq -c|sort -nr|head -100
7.列出传输时间超过 30 秒的文件;
cat access.log |awk ‘($NF > 30){print$7}‘|sort -n|uniq -c|sort -nr|head -20
8.统计网站流量(G);
cat access.log |awk ‘{sum+=$10} END {printsum/1024/1024/1024}‘
9.统计404的连接;
awk ‘($9 ~/404/)‘ access.log | awk ‘{print$9,$7}‘ | sort
10.统计http status;
cat access.log |awk ‘{counts[$(9)]+=1}; END{for(code in counts) print code, counts[code]}‘ cat access.log |awk ‘{print $9}‘|sort|uniq-c|sort -rn
11.蜘蛛分析,查看是哪些蜘蛛在抓取内容。
/usr/sbin/tcpdump -i eth0 -l -s 0 -w - dst port80 | strings | grep -i user-agent | grep -i -E ‘bot|crawler|slurp|spider‘
/usr/sbin/tcpdump -i eth0 -s 0 -l -w - dst port3306 | strings | egrep -i‘SELECT|UPDATE|DELETE|INSERT|SET|COMMIT|ROLLBACK|CREATE|DROP|ALTER|CALL‘
2.系统Debug分析篇;
1、调试命令
strace -p pid
gdb -p pid
.
本文出自 “渲染不变的昨天” 博客,谢绝转载!
标签:awk 日常工作总结
原文地址:http://breaklinux.blog.51cto.com/8193722/1775785