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(a in S) print a, S[a]}’ 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 netstat -ant|awk ‘/ip:80/{split($5,ip,”:”);++S[ip[1]]}END{for (a in S) print S[a],a}’ |sort -n netstat -ant|awk ‘/:80/{split($5,ip,”:”);++S[ip[1]]}END{for (a in S) print S[a],a}’ |sort -rn|head -n 10 awk ‘BEGIN{printf (“http_code\tcount_num\n”)}{COUNT[$10]++}END{for (a in COUNT) printf a”\t\t”COUNT[a]”\n”}’ 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.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
网站日志分析(Apache): 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及统计所有访问IP cat access.log|awk ‘{print $11}’|sort|uniq -c|sort -nr|head -20 awk ‘{ print $1}’ access.log |sort -n -r |uniq -c|wc -l 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 4.列出输出大于200000byte(约200kb)的exe文件以及对应文件发生次数 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 ” ” $7}’|sort -nr|head -100 6.列出最最耗时的页面(超过60秒的)的以及对应页面发生次数 cat access.log |awk ‘($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 {print sum/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.每秒并发: awk ‘{if($9~/200|30|404/)COUNT[$4]++}END{for( a in COUNT) print a,COUNT[a]}’|sort -k 2 -nr|head -n10 12.带宽统计 cat apache.log |awk ‘{if($7~/GET/) count++}END{print “client_request=”count}’ cat apache.log |awk ‘{BYTE+=$11}END{print “client_kbyte_out=”BYTE/1024″KB”}’ 13.统计对象数量及对象平均大小 cat access.log |awk ‘{byte+=$10}END{ print byte/NR/1024,NR}’ cat access.log |awk ‘{if($9~/200|30/)COUNT[$NF]++}END{for( a in COUNT) print a,COUNT [a],NR,COUNT[a]/NR*100″%”} 14.取5分钟日志 if [ $DATE_MINUTE != $DATE_END_MINUTE ] ;then #则判断开始时间戳与结束时间戳是否相等START_LINE=`sed -n “/$DATE_MINUTE/=” $APACHE_LOG|head -n1` #如果不相等,则取出开始时间戳的行号,与结束时间戳的行号 #END_LINE=`sed -n “/$DATE_END_MINUTE/=” $APACHE_LOG|tail -n1` END_LINE=`sed -n “/$DATE_END_MINUTE/=” $APACHE_LOG|head -n1`sed -n “${START_LINE},${END_LINE}p” $APACHE_LOG > $MINUTE_LOG ##通过行号,取出5分钟内的日志内容 存放到 临时文件中 GET_START_TIME=`sed -n “${START_LINE}p” $APACHE_LOG|awk -F ‘[‘ ‘{print $2}’ |awk ‘{print $1}’| sed ‘s#/# #g’|sed ‘s#:# #’` #通过行号获取取出开始时间戳 GET_END_TIME=`sed -n “${END_LINE}p” $APACHE_LOG|awk -F ‘[‘ ‘{print $2}’ |awk ‘{print $1}’|sed ‘s#/# #g’|sed ‘s#:# #’` #通过行号获取结束时间戳 15.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 port 80 | strings | grep -i user-agent | grep -i -E ‘bot|crawler|slurp|spider’ 网站日分析2(Squid篇) 2.按域统计流量 zcat squid_access.log.tar.gz| awk ‘{print $10,$7}’ |awk ‘BEGIN{FS=”[ /]”}{trfc[$4]+=$1}END{for (domain in trfc){printf “%s\t%d\n”,domain,trfc[domain]}}’ 效率更高的perl版本请到此下载:http://docs.linuxtone.org/soft/tools/tr.pl 数据库篇 1.查看数据库执行的sql /usr/sbin/tcpdump -i eth0 -s 0 -l -w – dst port 3306 | strings | egrep -i ‘SELECT|UPDATE|DELETE|INSERT|SET|COMMIT|ROLLBACK|CREATE|DROP|ALTER|CALL’ 系统Debug分析篇 1.调试命令 strace -p pid 2.跟踪指定进程的PID gdb -p pid (责任编辑:IT) |