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Linux Web伺服器網站故障分析常用的命令 文章目錄[隱藏]系統串連狀態篇:網站日誌分析篇1(Apache):資料庫篇系統Debug分析篇系統串連狀態篇:1.查看TCP串連狀態netstat -nat |awk ‘{print $6}‘|sort|uniq -c|sort -rnnetstat -n | awk ‘/^tcp/ {++S[$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 -rnnetstat -ant | awk ‘{print $NF}‘ | grep -v ‘[a-z]‘ | sort | uniq -c2.尋找請求數請20個IP(常用於尋找攻來源):netstat -anlp|grep 80|grep tcp|awk ‘{print $5}‘|awk -F: ‘{print $1}‘|sort|uniq -c|sort -nr|head -n20netstat -ant |awk ‘/:80/{split($5,ip,":");++A[ip[1]]}END{for(i in A) print A[i],i}‘ |sort -rn|head -n203.用tcpdump嗅探80連接埠的訪問看看誰最高tcpdump -i eth0 -tnn dst port 80 -c 1000 | awk -F"." ‘{print $1"."$2"."$3"."$4}‘ | sort | uniq -c | sort -nr |head -204.尋找較多time_wait串連netstat -n|grep TIME_WAIT|awk ‘{print $5}‘|sort|uniq -c|sort -rn|head -n205.找查較多的SYN串連netstat -an | grep SYN | awk ‘{print $5}‘ | awk -F: ‘{print $1}‘ | sort | uniq -c | sort -nr | more6.根據連接埠列進程netstat -ntlp | grep 80 | awk ‘{print $7}‘ | cut -d/ -f1網站日誌分析篇1(Apache):1.獲得訪問前10位的ip地址cat access.log|awk ‘{print $1}‘|sort|uniq -c|sort -nr|head -10cat access.log|awk ‘{counts[$(11)]+=1}; END {for(url in counts) print counts[url], url}‘2.訪問次數最多的檔案或頁面,取前20cat access.log|awk ‘{print $11}‘|sort|uniq -c|sort -nr|head -203.列出傳輸最大的幾個exe檔案(分析下載站的時候常用)cat access.log |awk ‘($7~/.exe/){print $10 " " $1 " " $4 " " $7}‘|sort -nr|head -204.列出輸出大於200000byte(約200kb)的exe檔案以及對應檔案發生次數cat access.log |awk ‘($10 > 200000 && $7~/.exe/){print $7}‘|sort -n|uniq -c|sort -nr|head -1005.如果日誌最後一列記錄的是分頁檔傳輸時間,則有列出到用戶端最耗時的頁面cat access.log |awk ‘($7~/.php/){print $NF " " $1 " " $4 " " $7}‘|sort -nr|head -1006.列出最最耗時的頁面(超過60秒的)的以及對應頁面發生次數cat access.log |awk ‘($NF > 60 && $7~/.php/){print $7}‘|sort -n|uniq -c|sort -nr|head -1007.列出傳輸時間超過 30 秒的檔案cat access.log |awk ‘($NF > 30){print $7}‘|sort -n|uniq -c|sort -nr|head -208.統計網站流量(G)cat access.log |awk ‘{sum+=$10} END {print sum/1024/1024/1024}‘9.統計404的串連awk ‘($9 ~/404/)‘ access.log | awk ‘{print $9,$7}‘ | sort10. 統計http statuscat access.log |awk ‘{counts[$(9)]+=1}; END {for(coolcode in counts) print coolcode, counts}‘cat access.log |awk ‘{print $9}‘|sort|uniq -c|sort -rn10.蜘蛛分析,查看是哪些蜘蛛在抓取內容。/usr/sbin/tcpdump -i eth0 -l -s 0 -w - dst port 80 | strings | grep -i user-agent | grep -i -E ‘bot|crawler|slurp|spider‘網站日分析2(Squid篇)按域統計流量zcat squid_access.log.tar.gz| awk ‘{print $10,$7}‘ |awk ‘BEGIN{FS="[ /]"}{trfc[$4]+=$1}END{for(domain in trfc){printf "%st%dn",domain,trfc[domain]}}‘資料庫篇1.查看資料庫執行的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‘系統Debug分析篇1.調試命令strace -p pid2.跟蹤指定進程的PIDgdb -p pid轉自:http://www.ha97.com/4392.html
Linux Web伺服器網站故障分析常用的命令