1.\u67e5\u770bTCP\u8fde\u63a5\u72b6\u6001
\nnetstat -nat |awk '{print $6}'|sort|uniq -c|sort -rn
\nnetstat -n | awk '\/^tcp\/ {++S[$NF]};END {for(a in S) print a, S[a]}' \u6216
\nnetstat -n | awk '\/^tcp\/ {++state[$NF]}; END {for(key in state) print key,"\\t",state[key]}'
\nnetstat -n | awk '\/^tcp\/ {++arr[$NF]};END {for(k in arr) print k,"\\t",arr[k]}'
\nnetstat -n |awk '\/^tcp\/ {print $NF}'|sort|uniq -c|sort -rn
\nnetstat -ant | awk '{print $NF}' | grep -v '[a-z]' | sort | uniq -c<\/p>\n<\/p>\n
2.\u67e5\u627e\u8bf7\u6c42\u6570\u8bf720\u4e2aIP\uff08\u5e38\u7528\u4e8e\u67e5\u627e\u653b\u6765\u6e90\uff09\uff1a
\nnetstat -anlp|grep 80|grep tcp|awk '{print $5}'|awk -F: '{print $1}'|sort|uniq -c|sort -nr|head -n20
\nnetstat -ant |awk '\/:80\/{split($5,ip,":");++A[ip[1]]}END{for(i in A) print A[i],i}' |sort -rn|head -n20<\/p>\n
3.\u7528tcpdump\u55c5\u63a280\u7aef\u53e3\u7684\u8bbf\u95ee\u770b\u770b\u8c01\u6700\u9ad8
\ntcpdump -i eth0 -tnn dst port 80 -c 1000 | awk -F"." '{print $1\u2033."$2\u2033."$3\u2033."$4}' | sort | uniq -c | sort -nr |head -20<\/p>\n
4.\u67e5\u627e\u8f83\u591atime_wait\u8fde\u63a5
\nnetstat -n|grep TIME_WAIT|awk '{print $5}'|sort|uniq -c|sort -rn|head -n20<\/p>\n
5.\u627e\u67e5\u8f83\u591a\u7684SYN\u8fde\u63a5
\nnetstat -an | grep SYN | awk '{print $5}' | awk -F: '{print $1}' | sort | uniq -c | sort -nr | more<\/p>\n
6.\u6839\u636e\u7aef\u53e3\u5217\u8fdb\u7a0b
\nnetstat -ntlp | grep 80 | awk '{print $7}' | cut -d\/ -f1<\/p>\n
1.\u83b7\u5f97\u8bbf\u95ee\u524d10\u4f4d\u7684ip\u5730\u5740
\ncat access.log|awk '{print $1}'|sort|uniq -c|sort -nr|head -10
\ncat access.log|awk '{counts[$(11)]+=1}; END {for(url in counts) print counts[url], url}'<\/p>\n
2.\u8bbf\u95ee\u6b21\u6570\u6700\u591a\u7684\u6587\u4ef6\u6216\u9875\u9762,\u53d6\u524d20
\ncat access.log|awk '{print $11}'|sort|uniq -c|sort -nr|head -20<\/p>\n
3.\u5217\u51fa\u4f20\u8f93\u6700\u5927\u7684\u51e0\u4e2aexe\u6587\u4ef6\uff08\u5206\u6790\u4e0b\u8f7d\u7ad9\u7684\u65f6\u5019\u5e38\u7528\uff09
\ncat access.log |awk '($7~\/.exe\/){print $10 " " $1 " " $4 " " $7}'|sort -nr|head -20<\/p>\n
4.\u5217\u51fa\u8f93\u51fa\u5927\u4e8e200000byte(\u7ea6200kb)\u7684exe\u6587\u4ef6\u4ee5\u53ca\u5bf9\u5e94\u6587\u4ef6\u53d1\u751f\u6b21\u6570
\ncat access.log |awk '($10 > 200000 && $7~\/.exe\/){print $7}'|sort -n|uniq -c|sort -nr|head -100<\/p>\n
5.\u5982\u679c\u65e5\u5fd7\u6700\u540e\u4e00\u5217\u8bb0\u5f55\u7684\u662f\u9875\u9762\u6587\u4ef6\u4f20\u8f93\u65f6\u95f4\uff0c\u5219\u6709\u5217\u51fa\u5230\u5ba2\u6237\u7aef\u6700\u8017\u65f6\u7684\u9875\u9762
\ncat access.log |awk '($7~\/.php\/){print $NF " " $1 " " $4 " " $7}'|sort -nr|head -100<\/p>\n
6.\u5217\u51fa\u6700\u6700\u8017\u65f6\u7684\u9875\u9762(\u8d85\u8fc760\u79d2\u7684)\u7684\u4ee5\u53ca\u5bf9\u5e94\u9875\u9762\u53d1\u751f\u6b21\u6570
\ncat access.log |awk '($NF > 60 && $7~\/.php\/){print $7}'|sort -n|uniq -c|sort -nr|head -100<\/p>\n
7.\u5217\u51fa\u4f20\u8f93\u65f6\u95f4\u8d85\u8fc7 30 \u79d2\u7684\u6587\u4ef6
\ncat access.log |awk '($NF > 30){print $7}'|sort -n|uniq -c|sort -nr|head -20<\/p>\n
8.\u7edf\u8ba1\u7f51\u7ad9\u6d41\u91cf\uff08G)
\ncat access.log |awk '{sum+=$10} END {print sum\/1024\/1024\/1024}'<\/p>\n
9.\u7edf\u8ba1404\u7684\u8fde\u63a5
\nawk '($9 ~\/404\/)' access.log | awk '{print $9,$7}' | sort<\/p>\n
cat access.log |awk '{counts[$(9)]+=1}; END {for(code in counts) print code, counts[code]}'
\ncat access.log |awk '{print $9}'|sort|uniq -c|sort -rn<\/p>\n
10.\u8718\u86db\u5206\u6790
\n\u67e5\u770b\u662f\u54ea\u4e9b\u8718\u86db\u5728\u6293\u53d6\u5185\u5bb9\u3002
\n\/usr\/sbin\/tcpdump -i eth0 -l -s 0 -w – dst port 80 | strings | grep -i user-agent | grep -i -E 'bot|crawler|slurp|spider'
\n\u7f51\u7ad9\u65e5\u5206\u67902(Squid\u7bc7\uff09
\n2.\u6309\u57df\u7edf\u8ba1\u6d41\u91cf
\nzcat squid_access.log.tar.gz| awk '{print $10,$7}' |awk 'BEGIN{FS="[ \/]"}{trfc[$4]+=$1}END{for(domain in trfc){printf "%s\\t%d\\n",domain,trfc[domain]}}'<\/p>\n
\n\n
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<\/div><\/td>
\n2$count = 0;
\n3
\n4%HOST;
\n5
\n6open(LOG, $ARGV[0]);
\n7while (my $line = <LOG>)
\n8{
\n9 $count++;
\n10 print "[INFO]Count: $count \\n" if ($count % 100000 == 0);
\n11
\n12 $tmp_1 = index($line, "http:\/\/") + 7;
\n13 $host = substr($line, $tmp_1, index($line, "\/", $tmp_1) - $tmp_1);
\n14 next if (length($host) < 5);
\n15
\n16 $tmp_1 = index($line, "\\" ") + 6;
\n17 $size = substr($line, $tmp_1, index($line, "\\"", $tmp_1) - 1 - $tmp_1);
\n18 next if ($size !~ \/^(\\d+)$\/);
\n19
\n20 $HOST{$host} += $size;
\n21}
\n22close(LOG);
\n23
\n24print "Total Count:$count\\n";
\n25print "Result:\\n";
\n26
\n27foreach my $key1 (sort keys %HOST)
\n28{
\n29 $sizeNum = $HOST{$key1};
\n30 $sizeTxt = "b";
\n31 while($sizeNum >= 1024)
\n32 {
\n33 $sizeNum = $sizeNum \/ 1024;
\n34 if ($sizeTxt eq "b")
\n35 {
\n36 $sizeTxt = "Kb";
\n37 }
\n38 elsif ($sizeTxt eq "Kb")
\n39 {
\n40 $sizeTxt = "Mb";
\n41 }
\n42 elsif ($sizeTxt eq "Mb")
\n43 {
\n44 $sizeTxt = "Gb";
\n45 }
\n46 }
\n47 printf "%s | %.2f%2s\\n", $key1, $sizeNum, $sizeTxt;
\n48}
\n49
\n50<\/div><\/td><\/tr><\/tbody><\/table><\/div>\n\n<\/pre>\n##\u6570\u636e\u5e93\u7bc7<\/p>\n
1.\u67e5\u770b\u6570\u636e\u5e93\u6267\u884c\u7684sql
\n\/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'<\/p>\n\u7cfb\u7edfDebug\u5206\u6790\u7bc7<\/h2>\n
1.\u8c03\u8bd5\u547d\u4ee4
\nstrace -p pid
\n2.\u8ddf\u8e2a\u6307\u5b9a\u8fdb\u7a0b\u7684PID
\ngdb -p pid
\n[root@localhost ~]# vmstat -n 3\u00a0 \u00a0\u00a0 \u00a0 (\u6bcf\u4e2a3\u79d2\u5237\u65b0\u4e00\u6b21\uff09
\nprocs ———–memory———- —swap– —–io—- –system– —-cpu—-
\nr b\u00a0 \u00a0swpd\u00a0 \u00a0free\u00a0 \u00a0buff cache\u00a0 \u00a0si\u00a0 \u00a0so\u00a0 \u00a0 bi\u00a0 \u00a0 bo\u00a0 \u00a0in\u00a0 \u00a0 cs us sy id wa
\n1 0\u00a0 \u00a0 144 186164 105252 2386848\u00a0 \u00a0 0\u00a0 \u00a0 0\u00a0 \u00a0 18\u00a0 \u00a0166\u00a0 \u00a083\u00a0 \u00a0\u00a0\u00a02 48 21 31 0
\n2 0\u00a0 \u00a0 144 189620 105252 2386848\u00a0 \u00a0 0\u00a0 \u00a0 0\u00a0 \u00a0\u00a0\u00a00\u00a0 \u00a0177 1039 1210 34 10 56 0
\n0 0\u00a0 \u00a0 144 214324 105252 2386848\u00a0 \u00a0 0\u00a0 \u00a0 0\u00a0 \u00a0\u00a0\u00a00\u00a0 \u00a0 10 1071\u00a0 \u00a0670 32 5 63 0
\n0 0\u00a0 \u00a0 144 202212 105252 2386848\u00a0 \u00a0 0\u00a0 \u00a0 0\u00a0 \u00a0\u00a0\u00a00\u00a0 \u00a0189 1035\u00a0 \u00a0558 20 3 77 0
\n2 0\u00a0 \u00a0 144 158772 105252 2386848\u00a0 \u00a0 0\u00a0 \u00a0 0\u00a0 \u00a0\u00a0\u00a00\u00a0 \u00a0203 1065 2832 70 14 15 0
\nvmstat\u6240\u5e26\u53c2\u6570\u8bf7\u7528man vmstat\u67e5\u770b
\n**Procs **<\/p>\nr: \u7b49\u5f85\u8fd0\u884c\u7684\u8fdb\u7a0b\u6570 b: \u5904\u5728\u975e\u4e2d\u65ad\u7761\u7720\u72b6\u6001\u7684\u8fdb\u7a0b\u6570 w: \u88ab\u4ea4\u6362\u51fa\u53bb\u7684\u53ef\u8fd0\u884c\u7684\u8fdb\u7a0b\u6570\u3002\u6b64\u6570\u7531 linux \u8ba1\u7b97\u5f97\u51fa\uff0c\u4f46 linux \u5e76\u4e0d\u8017\u5c3d\u4ea4\u6362\u7a7a\u95f4<\/p>\n
**Memory **<\/p>\n
swpd: \u865a\u62df\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u5355\u4f4d\uff1aKB<\/p>\n
free: \u7a7a\u95f2\u7684\u5185\u5b58\uff0c\u5355\u4f4dKB<\/p>\n
buff: \u88ab\u7528\u6765\u505a\u4e3a\u7f13\u5b58\u7684\u5185\u5b58\u6570\uff0c\u5355\u4f4d\uff1aKB<\/p>\n
**Swap **<\/p>\n
si: \u4ece\u78c1\u76d8\u4ea4\u6362\u5230\u5185\u5b58\u7684\u4ea4\u6362\u9875\u6570\u91cf\uff0c\u5355\u4f4d\uff1aKB\/\u79d2<\/p>\n
so: \u4ece\u5185\u5b58\u4ea4\u6362\u5230\u78c1\u76d8\u7684\u4ea4\u6362\u9875\u6570\u91cf\uff0c\u5355\u4f4d\uff1aKB\/\u79d2<\/p>\n
**IO **<\/p>\n
bi: \u53d1\u9001\u5230\u5757\u8bbe\u5907\u7684\u5757\u6570\uff0c\u5355\u4f4d\uff1a\u5757\/\u79d2<\/p>\n
bo: \u4ece\u5757\u8bbe\u5907\u63a5\u6536\u5230\u7684\u5757\u6570\uff0c\u5355\u4f4d\uff1a\u5757\/\u79d2<\/p>\n
**System **<\/p>\n
in: \u6bcf\u79d2\u7684\u4e2d\u65ad\u6570\uff0c\u5305\u62ec\u65f6\u949f\u4e2d\u65ad<\/p>\n
cs: \u6bcf\u79d2\u7684\u73af\u5883\uff08\u4e0a\u4e0b\u6587\uff09\u5207\u6362\u6b21\u6570<\/p>\n
**CPU **<\/p>\n
\u6309 CPU \u7684\u603b\u4f7f\u7528\u767e\u5206\u6bd4\u6765\u663e\u793a<\/p>\n
us: CPU \u4f7f\u7528\u65f6\u95f4<\/p>\n
sy: CPU \u7cfb\u7edf\u4f7f\u7528\u65f6\u95f4<\/p>\n
id: \u95f2\u7f6e\u65f6\u95f4<\/p>\n
\u51c6\u6d4b<\/p>\n
r
\n\uff0cb\u22480\uff0c<\/p>\n\u5982\u679cfre\uff0c\u5c06\u4f1a\u51fa\u73b0\u8fde\u7eed\u4e0d\u65ad\u7684\u9875\u9762\u8c03\u5ea6\uff0c\u5c06\u5bfc\u81f4\u7cfb\u7edf\u6027\u80fd\u95ee\u9898\u3002<\/p>\n
\u5bf9\u4e8epage\u5217\uff0cre\uff0cpi\uff0cpo\uff0ccy\u7ef4\u6301\u4e8e\u6bd4\u8f83\u7a33\u5b9a\u7684\u72b6\u6001\uff0cPI\u7387\u4e0d\u8d85\u8fc75\uff0c\u5982\u679c\u6709pagin\u53d1\u751f\uff0c\u90a3\u4e48\u5173\u8054\u9875\u9762\u5fc5\u987b\u5148\u8fdb\u884c
\npageout
\n\u5728\u5185\u5b58\u76f8\u5bf9\u7d27\u5f20\u7684\u73af\u5883\u4e0bpagein\u4f1a\u5f3a\u5236\u5bf9\u4e0d\u540c\u7684\u9875\u9762\u8fdb\u884csteal\u64cd\u4f5c\u3002\u5982\u679c\u7cfb\u7edf\u6b63\u5728\u8bfb\u4e00\u4e2a\u5927\u6279\u7684\u6c38\u4e45\u9875\u9762\uff0c\u4f60\u4e5f\u8bb8\u53ef\u4ee5\u770b\u5230po\u548cpi\u5217<\/p>\n\u4f1a\u51fa\u73b0\u4e0d\u4e00\u81f4\u7684\u589e\u957f\uff0c\u8fd9\u79cd\u60c5\u666f\u5e76\u4e0d\u4e00\u5b9a\u8868\u660e\u7cfb\u7edf\u8d1f\u8f7d\u8fc7\u91cd\uff0c\u4f46\u662f\u6709\u5fc5\u8981\u5bf9\u5e94\u7528\u7a0b\u5e8f\u7684\u6570\u636e\u8bbf\u95ee\u6a21\u5f0f\u8fdb\u884c\u89c1\u68c0\u67e5\u3002\u5728\u7a33\u5b9a\u7684\u60c5\u51b5\u4e0b\uff0c\u626b\u63cf\u7387\u548c\u91cd\u7f6e\u7387\u51e0\u4e4e\u76f8\u7b49\uff0c\u5728<\/p>\n
\u591a\u4e2a\u8fdb\u7a0b\u5904\u7406\u4f7f\u7528\u4e0d\u540c\u7684\u9875\u9762\u7684\u60c5\u51b5\u4e0b\uff0c\u9875\u9762\u4f1a\u66f4\u52a0\u4e0d\u7a33\u5b9a\u548c\u6742\u4e71\uff0c\u8fd9\u65f6\u626b\u63cf\u7387\u53ef\u80fd\u4f1a\u6bd4\u91cd\u7f6e\u7387\u9ad8\u51fa\u3002<\/p>\n
faults\u5217\uff0cin\uff0csy\uff0ccs\u4f1a\u4e0d\u65ad\u8df3\u8dc3\uff0c\u8fd9\u91cc\u6ca1\u6709\u660e\u786e\u7684\u9650\u5236\uff0c\u552f\u4e00\u7684\u5c31\u662f\u8fd9\u4e9b\u503c\u6700\u5c11\u5927\u4e8e100<\/p>\n
cpu
\n\u5217\uff0cus\uff0csys\uff0cid\u548cwa\u4e5f\u662f\u4e0d\u786e\u5b9a\u7684\uff0c\u6700\u7406\u60f3\u7684\u72b6\u6001\u662f\u4f7fcpu\u5904\u4e8e100%\u5de5\u4f5c\u72b6\u6001\uff0c\u5355\u8fd9\u53ea\u9002\u5408\u5355\u7528\u6237\u7684\u60c5\u51b5\u4e0b\u3002<\/p>\n\u5982\u679c\u5728\u591a\u7528\u6237\u73af\u5883\u4e2dus\uff0bsys\u300b80\uff0c\u8fdb\u7a0b\u5c31\u4f1a\u5728\u8fd0\u884c\u961f\u5217\u4e2d\u82b1\u8d39\u7b49\u5f85\u65f6\u95f4\uff0c\u54cd\u5e94\u65f6\u95f4\u548c\u541e\u5410\u91cf\u5c31\u4f1a\u4e0b\u964d\u3002wa>40\u8868\u660e\u78c1\u76d8io\u6ca1\u6709\u4e5f\u8bb8\u5b58\u5728\u4e0d\u5408\u7406\u7684\u5e73\u8861\uff0c\u6216\u8005\u5bf9\u78c1\u76d8\u64cd\u4f5c\u6bd4\u8f83\u9891\u7e41\uff0c<\/p>\n
vmstat
\n\u5404\u9879\uff1a<\/p>\nprocs:
\nr–>
\n\u5728\u8fd0\u884c\u961f\u5217\u4e2d\u7b49\u5f85\u7684\u8fdb\u7a0b\u6570
\nb–>\u5728\u7b49\u5f85io\u7684\u8fdb\u7a0b\u6570
\nw–>\u53ef\u4ee5\u8fdb\u5165\u8fd0\u884c\u961f\u5217\u4f46\u88ab\u66ff\u6362\u7684\u8fdb\u7a0b
\nmemoy
\nswap–>\u73b0\u65f6\u53ef\u7528\u7684\u4ea4\u6362\u5185\u5b58\uff08k\u8868\u793a\uff09
\nfree–>\u7a7a\u95f2\u7684\u5185\u5b58\uff08k\u8868\u793a\uff09
\npages
\nre\uff0d\uff0d\u300b\u56de\u6536\u7684\u9875\u9762
\nmf\uff0d\uff0d\u300b\u975e\u4e25\u91cd\u9519\u8bef\u7684\u9875\u9762
\npi\uff0d\uff0d\u300b\u8fdb\u5165\u9875\u9762\u6570\uff08k\u8868\u793a\uff09
\npo\uff0d\uff0d\u300b\u51fa\u9875\u9762\u6570\uff08k\u8868\u793a\uff09
\nfr\uff0d\uff0d\u300b\u7a7a\u4f59\u7684\u9875\u9762\u6570\uff08k\u8868\u793a\uff09
\nde\uff0d\uff0d\u300b\u63d0\u524d\u8bfb\u5165\u7684\u9875\u9762\u4e2d\u7684\u672a\u547d\u4e2d\u6570
\nsr\uff0d\uff0d\u300b\u901a\u8fc7\u65f6\u949f\u7b97\u6cd5\u626b\u63cf\u7684\u9875\u9762
\ndisk \u663e\u793a\u6bcf\u79d2\u7684\u78c1\u76d8\u64cd\u4f5c\u3002 s\u8868\u793ascsi\u76d8\uff0c0\u8868\u793a\u76d8\u53f7
\nfault \u663e\u793a\u6bcf\u79d2\u7684\u4e2d\u65ad\u6570
\nin\uff0d\uff0d\u300b\u8bbe\u5907\u4e2d\u65ad
\nsy\uff0d\uff0d\u300b\u7cfb\u7edf\u4e2d\u65ad
\ncy\uff0d\uff0d\u300bcpu\u4ea4\u6362
\ncpu \u8868\u793acpu\u7684\u4f7f\u7528\u72b6\u6001
\ncs\uff0d\uff0d\u300b\u7528\u6237\u8fdb\u7a0b\u4f7f\u7528\u7684\u65f6\u95f4
\nsy\uff0d\uff0d\u300b\u7cfb\u7edf\u8fdb\u7a0b\u4f7f\u7528\u7684\u65f6\u95f4
\nid\uff0d\uff0d\u300bcpu\u7a7a\u95f2\u7684\u65f6\u95f4
\n\u5982\u679c r\u7ecf\u5e38\u5927\u4e8e 4 \uff0c\u4e14id\u7ecf\u5e38\u5c11\u4e8e40\uff0c\u8868\u793acpu\u7684\u8d1f\u8377\u5f88\u91cd\u3002
\n\u5982\u679cpi\uff0cpo \u957f\u671f\u4e0d\u7b49\u4e8e0\uff0c\u8868\u793a\u5185\u5b58\u4e0d\u8db3\u3002
\n\u5982\u679cdisk \u7ecf\u5e38\u4e0d\u7b49\u4e8e0\uff0c \u4e14\u5728 b\u4e2d\u7684\u961f\u5217 \u5927\u4e8e3\uff0c \u8868\u793a io\u6027\u80fd\u4e0d\u597d\u3002<\/p>\nLinux
\n\u5728\u5177\u6709\u9ad8\u7a33\u5b9a\u6027\u3001\u53ef\u9760\u6027\u7684\u540c\u65f6\uff0c\u5177\u6709\u5f88\u597d\u7684\u53ef\u4f38\u7f29\u6027\u548c\u6269\u5c55\u6027\uff0c\u80fd\u591f\u9488\u5bf9\u4e0d\u540c\u7684\u5e94\u7528\u548c\u786c\u4ef6\u73af\u5883\u8c03\u6574\uff0c\u4f18\u5316\u51fa\u6ee1\u8db3\u5f53\u524d\u5e94\u7528\u9700\u8981\u7684\u6700\u4f73\u6027\u80fd\u3002\u56e0\u6b64\u4f01\u4e1a\u5728\u7ef4\u62a4Linux\u7cfb\u7edf\u3001\u8fdb\u884c\u7cfb\u7edf\u8c03\u4f18\u65f6\uff0c\u4e86\u89e3\u7cfb\u7edf\u6027\u80fd\u5206\u6790\u5de5\u5177\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002<\/p>\n\u5728Linux\u4e0b\u6709\u5f88\u591a\u7cfb\u7edf\u6027\u80fd\u5206\u6790\u5de5\u5177\uff0c\u6bd4\u8f83\u5e38\u89c1\u7684\u6709top\u3001free\u3001ps\u3001time\u3001timex\u3001uptime\u7b49\u3002\u4e0b\u6587\u5c06\u4ecb\u7ecd\u51e0\u4e2a\u8f83\u4e3a\u91cd\u8981\u7684\u6027\u80fd\u5206\u6790\u5de5\u5177vmstat\u3001iostat\u548csar\u53ca\u5176\u4f7f\u7528\u3002
\n\u7528vmstat\u76d1\u89c6\u5185\u5b58\u4f7f\u7528\u60c5\u51b5<\/strong>
\nvmstat\u662fVirtual Meomory Statistics\uff08\u865a\u62df\u5185\u5b58\u7edf\u8ba1\uff09\u7684\u7f29\u5199\uff0c\u53ef\u5bf9\u64cd\u4f5c\u7cfb\u7edf\u7684\u865a\u62df\u5185\u5b58\u3001\u8fdb\u7a0b\u3001CPU\u6d3b\u52a8\u8fdb\u884c\u76d1\u89c6\u3002\u5b83\u662f\u5bf9\u7cfb\u7edf\u7684\u6574\u4f53\u60c5\u51b5\u8fdb\u884c\u7edf\u8ba1\uff0c\u4e0d\u8db3\u4e4b\u5904\u662f\u65e0\u6cd5\u5bf9\u67d0\u4e2a\u8fdb\u7a0b\u8fdb\u884c\u6df1\u5165\u5206\u6790\u3002
\nvmstat\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\nvmstat [-V] [-n] [delay [count]]<\/p>\n
\u5176\u4e2d\uff0c\uff0dV\u8868\u793a\u6253\u5370\u51fa\u7248\u672c\u4fe1\u606f\uff1b\uff0dn\u8868\u793a\u5728\u5468\u671f\u6027\u5faa\u73af\u8f93\u51fa\u65f6\uff0c\u8f93\u51fa\u7684\u5934\u90e8\u4fe1\u606f\u4ec5\u663e\u793a\u4e00\u6b21\uff1bdelay\u662f\u4e24\u6b21\u8f93\u51fa\u4e4b\u95f4\u7684\u5ef6\u8fdf\u65f6\u95f4\uff1bcount\u662f\u6307\u6309\u7167\u8fd9\u4e2a\u65f6\u95f4\u95f4\u9694\u7edf\u8ba1\u7684\u6b21\u6570\u3002\u5bf9\u4e8evmstat\u8f93\u51fa\u5404\u5b57\u6bb5\u7684\u542b\u4e49\uff0c\u53ef\u8fd0\u884cman vmstat\u67e5\u770b<\/p>\n
\u6d4b\u8bd5\u5c40\u57df\u7f51\u5185\u4e3b\u673a\u662f\u5426alive\u7684\u5c0f\u811a\u672c<\/h2>\n
\u6b64\u811a\u672c\u7528\u4e8e\u68c0\u67e5192.168.1.100\u5230192.168.1.200\u4e4b\u95f4\u7684\u4e3b\u673a\u662f\u5426alive\u3002\u811a\u672c\u5982\u4e0b\uff1a<\/p>\n
\n\n
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<\/div><\/td>
\n2#Checks to see if hosts 192.168.1.100-192.168.1.200 are alive
\n3for n in {100..200}; do
\n4 host=192.168.1.$n
\n5 ping -c2 $host &>\/dev\/null
\n6 if [ $? = 0 ]; then
\n7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 echo "$host is UP"
\n8\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 else
\n9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 echo "$host is DOWN"
\n10\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 fi
\n11done
\n12<\/div><\/td><\/tr><\/tbody><\/table><\/div>\n\n<\/pre>\n\u203b\u6e29\u99a8\u5c0f\u63d0\u793a\uff1a\u6ce8\u610f$?\u4e0e=\u4e4b\u95f4\u5fc5\u987b\u7a7a\u683c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u7f51\u7ad9\u6392\u969c\u5206\u6790\u5e38\u7528\u7684\u547d\u4ee4 \u7cfb\u7edf\u8fde\u63a5\u72b6\u6001\u7bc7\uff1a 1.\u67e5\u770bTCP\u8fde\u63a5\u72b6\u6001 netstat -nat |awk '{print $6}'|sort|uniq -c|sort -rn netstat -n | awk '\/^tcp\/ {++S<\/p>\n","protected":false},"author":1,"featured_media":6522,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"categories":[6],"tags":[292,17,496,14,23,25,498,21,15,500,20],"collection":[],"_links":{"self":[{"href":"https:\/\/aqzt.com\/wp-json\/wp\/v2\/posts\/15601"}],"collection":[{"href":"https:\/\/aqzt.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aqzt.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aqzt.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aqzt.com\/wp-json\/wp\/v2\/comments?post=15601"}],"version-history":[{"count":0,"href":"https:\/\/aqzt.com\/wp-json\/wp\/v2\/posts\/15601\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aqzt.com\/wp-json\/wp\/v2\/media\/6522"}],"wp:attachment":[{"href":"https:\/\/aqzt.com\/wp-json\/wp\/v2\/media?parent=15601"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aqzt.com\/wp-json\/wp\/v2\/categories?post=15601"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aqzt.com\/wp-json\/wp\/v2\/tags?post=15601"},{"taxonomy":"collection","embeddable":true,"href":"https:\/\/aqzt.com\/wp-json\/wp\/v2\/collection?post=15601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}