#\u5220\u9664\u5f53\u524d\u6587\u4ef6\u5939\u4e2d\u5927\u5c0f\u4e3a0\u7684\u6587\u4ef6\n$ find . -type f -size 0 -exec rm -rf {} \\;\n$ find . -type f -size 0 -delete\n\n#\u4ee5\u6307\u5b9a\u683c\u5f0f\u663e\u793a\u8fdb\u7a0b\u4fe1\u606f{%C:cpu %p:pid %z:memory %a:command}\n$ ps -e -o \"%C : %p : %z : %a\"\n%CPU : PID : VSZ : COMMAND\n0.0 : 1 : 3540 : \/sbin\/init\n0.0 : 2 : 0 : [kthreadd]\n\n#\u6309\u5185\u5b58\u4f7f\u7528\u91cf\u4ece\u5927\u5230\u5c0f\u6392\u5217\n$ ps -e -o \"%C : %p : %z : %a\" | sort -k5 -nr\n\n#\u6309CPU\u5229\u7528\u7387\u4ece\u5927\u5230\u5c0f\u6392\u5217\n$ ps -e -o \"%C : %p : %z : %a\" | sort -nr\n\n#\u67e5\u770bTCP\u534f\u8bae\u8bf7\u6c42\u7684\u8fde\u63a5\u72b6\u6001\u53ca\u5176\u6570\u91cf\n# netstat -n | awk '\/^tcp\/ {++S[$NF]} END{for(a in S) print a, S[a]}'\n\n#\u628a\u6587\u4ef6\u4e2d\u5305\u542b\u6709Root\u7684\u884c\u4e2d\u7684\u7b2c\u4e00\u4e2ano\u66ff\u6362\u6210yes\n# sed -i '\/Root\/s\/no\/yes\/' \/etc\/ssh\/sshd_config\n\n#\u663e\u793a\u8fd0\u884c\u7ea7\u522b\u4e3a3\u65f6\uff0c\u5f00\u542f\u7684\u670d\u52a1\u9879\u76ee\n# ls \/etc\/rc3.d\/S* | cut -c 15-\n\n#\u53d6IP\u5730\u5740\n# ifconfig eth0 | grep 'inet addr:' |awk '{print $2}'|cut -c 6-\n# ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' |cut -d: -f2 | awk '{print $1}'\n\n#\u67e5\u770b80\u7aef\u53e3\u7684\u5df2\u5efa\u7acb\u8fde\u63a5\uff0c\u5e76\u6392\u5e8f\n# netstat -ant | grep \":80\" | grep ESTABLISHED | awk '{printf \"%s %sn\",$5,$6}' | sort\n\n#\u7edf\u8ba1\u4e00\u4e0b\u670d\u52a1\u5668\u4e0a\u9762\u6240\u6709\u7684jpg\u6587\u4ef6\u7684\u5927\u5c0f(\u53ef\u7075\u6d3b\u66f4\u6539)\n# find \/ -name \"*.jpg\" -exec wc -c {} \\; | awk '{print $1}' | awk '{a+=$1} END{print a}'<\/pre>\nbasename [pathname] [suffix]
\nbasename [string] [suffix]
\n\u5176\u4e2dsuffix\u4e3a\u540e\u7f00\uff0c\u5982\u679c\u6307\u5b9a\u4e86suffix\uff0cbasename\u4f1a\u5c06pathname\u6216string\u4e2d\u7684suffix\u53bb\u6389\u3002<\/p>\n
\u7528\u6cd5\u793a\u4f8b\uff1a
\n$ basename \/usr\/bin\/sort \u8f93\u51fa”sort”
\n$ basename .\/include\/stdio.h .h \u8f93\u51fa”stdio”<\/p>\n
\u670d\u52a1{RedHat\u7cfb\u5217}\n# chkconfig --list # \u5217\u51fa\u6240\u6709\u7cfb\u7edf\u670d\u52a1\n# chkconfig --list | grep on # \u5217\u51fa\u6240\u6709\u542f\u52a8\u7684\u7cfb\u7edf\u670d\u52a1\n\n\u670d\u52a1{Debian\u7cfb\u5217}\n# service --status-all\n\n\u7a0b\u5e8f{RedHat\u7cfb\u5217}\n# rpm -qa # \u67e5\u770b\u6240\u6709\u5b89\u88c5\u7684\u8f6f\u4ef6\u5305\n\n\u7a0b\u5e8f{Debian\u7cfb\u5217}\n# dpkg --list # \u67e5\u770b\u6240\u6709\u5b89\u88c5\u7684\u8f6f\u4ef6\u5305\n\n##########\ncksum\nmd5sum\nshasum\/sha1sum\/sha256sum\/sha512sum\n##########<\/pre>\n\u4e00\u3001\u6709\u65f6\u5019\u5e0c\u671b\u628a\u627e\u5230\u7684\u5305\u542b\u67d0\u4e9b\u5185\u5bb9\u7684\u6587\u4ef6\u540d\u5b57\u7ed9\u6253\u51fa\u6765\uff0c\u5982\u679c\u53ea\u662f\u9700\u8981\u6253\u5370\u6587\u4ef6\u540d(grep\u7684”-l\u9009\u9879”\u53ea\u6253\u5370\u5339\u914d\u7684\u6587\u4ef6\u540d)\uff0c\u4f7f\u7528\u5982\u4e0b\u547d\u4ee4\uff1a<\/p>\n
find . -name \"*.log\" -exec grep -l \"RspCode:20\" {} \\;<\/code><\/p>\n\u5982\u679c\u5e0c\u671b\u65e2\u628a\u6587\u4ef6\u6253\u5370\u51fa\u6765\uff0c\u8fd8\u628a\u76f8\u5e94\u7684\u5b57\u7b26\u4e32\u6240\u5728\u7684\u4f4d\u7f6e\u6253\u5370\u51fa\u6765(grep\u7684”-n\u9009\u9879”\u6253\u5370\u884c\u53f7)\uff0c\u4f7f\u7528\u5982\u4e0b\u547d\u4ee4\uff1a<\/p>\n
find . -type -f -name \"*.log\" -print | xargs grep -n \"RspCode:20\"<\/code><\/p>\n\u57fa\u672c\u4e0a\u90fd\u662f\u5728find\u548cgrep\u7684\u53c2\u6570\u4e0a\u9762\u505a\u6587\u7ae0\u3002<\/p>\n
\u4e8c\u3001\u53cd\u5411\u6253\u5370\u67d0\u4e2a\u6587\u4ef6\uff0c\u8fd9\u4e2a\u7528\u4e8e\u6587\u4ef6\u6bd4\u8f83\u5927\uff0c\u4f46\u9700\u8981\u4ece\u5c3e\u90e8\u6df1\u5165\u5730\u67e5\u770b\u3002tail\u4e0d\u80fd\u5f88\u597d\u5730\u652f\u6301\u7f16\u8f91\u641c\u7d22\u7b49\u529f\u80fd\u3002\u5b8c\u6210\u8fd9\u4e2a\u4efb\u52a1\u6700\u540e\u7684\u547d\u4ee4\u662fcat\u7684\u53cd\u5411\u4f53\uff1a<\/p>\n
tac<\/p>\n
\u4e09\u3001\u5982\u4f55\u770b\u67d0\u4e2a\u6587\u4ef6\u7684\u7cbe\u786e\u5730access time\u7b49\u4fe1\u606f\uff0c\u4e00\u822cls\u53ea\u80fd\u663e\u793a\u5230\u5206\u949f\u3002\u8fd9\u4e2a\u65f6\u5019\u5c31\u8981\u7528\u8fd9\u4e2a\u547d\u4ee4\uff1a<\/p>\n
stat<\/p>\n
\u56db\u3001\u663e\u793a\u8fdb\u7a0b\u7684\u8be6\u7ec6\u521b\u5efa\u65f6\u95f4<\/p>\n
ps -e -o command,pid,lstart | grep xxx<\/code><\/p>\n\u4e94\u3001\u7528\u6b63\u5219\u6740\u67d0\u4e9b\u8fdb\u7a0b<\/p>\n
pkill -f \"xxxx\"<\/code><\/p>\n\u516d\u3001\u5217\u51fa\u5305\u62ec\u5b50\u8fdb\u7a0b\u7684\u8fdb\u7a0b\u6811\uff1a<\/p>\n
ps axwef<\/code>
\npstree<\/p>\n\u4e03\u3001\u6d4b\u8bd5\u786c\u76d8\u5199\u5165\u901f\u5ea6\uff1a<\/p>\n
dd if=\/dev\/zero of=\/tmp\/output.img bs=8k count=256k; rm -rf \/tmp\/output.img<\/code><\/p>\n\u516b\u3001\u5217\u51fa\u524d10\u4e2a\u6700\u5927\u7684\u6587\u4ef6\uff1a<\/p>\n
lsof \/ | awk '{ if($7 > 1048576) print $7\/1048576 \"MB \"$9 }' | sort -nu | tail<\/code><\/p>\n\u4e5d\u3001\u663e\u793a\u5269\u4f59\u5185\u5b58(MB)\uff1a<\/p>\n
free -m | grep Mem | awk '\/[0-9]\/{ print $4\" MB\" }'<\/code><\/p>\n\u5341\u3001\u627e\u51fa\/home\/user\u4e0b\u6240\u6709\u7a7a\u5b50\u76ee\u5f55:<\/p>\n
find \/home\/user -maxdepth 1 -type d -empty<\/code><\/p>\n\u5341\u4e00\u3001\u83b7\u53d6test.txt\u6587\u4ef6\u4e2d\u7b2c50-60\u884c\u5185\u5bb9\uff1a<\/p>\n
sed -n '50,60p'\u00a0test.txt<\/code><\/p>\n\u5341\u4e8c\u3001\u5728\u6587\u4ef6\u4e2d\u67e5\u627e\u6574\u4e2a\u5355\u8bcd\uff1a<\/p>\n
grep -w \"name\" test.txt<\/code><\/p>\n\u5341\u4e09\u3001\u5728\u9700\u8981\u63d0\u5347\u6743\u9650\u7684\u60c5\u51b5\u4e0b\u5f80\u4e00\u4e2a\u6587\u4ef6\u91cc\u8ffd\u52a0\u6587\u672c\uff1a<\/p>\n
echo \"some text\" | sudo tee -a \/path\/file<\/code><\/p>\n\u5341\u56db\u3001\u5c06tabs\u8f6c\u6362\u6210\u7a7a\u683c\uff1a<\/p>\n
expand test.txt > test1.txt<\/code><\/p>\n\u5341\u4e94\u3001\u5f53Ctrl + c\u4e0d\u597d\u4f7f\u65f6\uff0c\u8bd5\u8bd5\uff1a<\/p>\n
Ctrl + `<\/p>\n
\u5341\u516d\u3001\u83b7\u53d6\u6587\u4ef6owner:<\/p>\n
stat -c %U file.txt<\/code><\/p>\n\u5341\u4e03\u3001\u5982\u4f55\u67e5\u627eyum\u548crpm\u5b89\u88c5\u7684lib\u7684\u8def\u5f84<\/p>\n
rpm -ql package-namel<\/code>
\nyum search buildrpmtree | less<\/code><\/p>\n\u5341\u516b\u3001\u7528\u6b63\u5219\u8fdb\u884c\u67e5\u627e\/\u5339\u914d<\/p>\n
grep xxx '(lo(nely|vely)'<\/code><\/p>\n\u7cfb\u7edf\u8fde\u63a5\u72b6\u6001\u7bc7<\/h5>\n\u67e5\u770bTCP\u8fde\u63a5\u72b6\u6001<\/h6>\n
netstat -n | awk '\/^tcp\/ {++S[$NF]} END {for(a in S) print a, S[a]}'<\/code><\/p>\n{\u8f93\u51fa\u7c7b\u4f3c\u4e8e\uff1a
\nSYN_RECV 1
\nESTABLISHED 1
\nTIME_WAIT 1
\n}<\/p>\n
\u67e5\u627e\u8bf7\u6c42\u6570\u524d20\u4e2aIP\uff08\u5e38\u7528\u4e8e\u67e5\u627e\u653b\u51fb\u6765\u6e90\uff09\uff1a<\/h6>\n
netstat -anlp|grep 80|grep tcp|awk '{print $5}'|awk -F: '{print $1}'|sort|uniq -c|sort -nr|head -n20<\/code><\/p>\nnetstat -ant |awk '\/:80\/{split($5,ip,\":\");++A[ip[1]]}END{for(i in A) print A[i],i}'|sort -rn|head -n20<\/code><\/p>\n\u7528tcpdump\u55c5\u63a280\u7aef\u53e3\u7684\u8bbf\u95ee\u770b\u770b\u8c01\u6700\u9ad8\uff08-c\u9009\u9879\u6307\u5b9a\u6355\u83b7packet\u7684\u4e2a\u6570\uff09<\/h6>\n
tcpdump -i eth0 -tnn dst port 80 -c 1000 | awk -F\".\" '{print $1\".\"$2\".\"$3\".\"$4}' | sort | uniq -c | sort -nr | head -20<\/code><\/p>\n\u67e5\u627e\u8f83\u591atime_wait\u8fde\u63a5<\/h6>\n
netstat -n|grep TIME_WAIT|awk '{print $5}'|sort|uniq -c|sort -rn|head -n20<\/code><\/p>\n\u627e\u67e5\u8f83\u591a\u7684SYN\u8fde\u63a5<\/h6>\n
netstat -an | grep SYN | awk '{print $5}' | awk -F: '{print $1}' | sort | uniq -c |sort -nr | more<\/code><\/p>\n\u6839\u636e\u7aef\u53e3\u5217\u8fdb\u7a0b<\/h6>\n
netstat -ntlp | grep 80 | awk '{print $7}' | cut -d\/ -f1<\/code><\/p>\n\u7f51\u7ad9\u65e5\u5fd7\u5206\u6790\uff08Apache\uff09\uff1a<\/h5>\n\u83b7\u5f97\u8bbf\u95ee\u524d10\u4f4d\u7684ip\u5730\u5740<\/h6>\n
cat access.log|awk '{print $1}'|sort|uniq -c|sort -nr|head -10<\/code><\/p>\ncat access.log|awk '{counts[$(11)]+=1}; END {for(url in counts) print counts[url], url}'<\/code><\/p>\n\u8bbf\u95ee\u6b21\u6570\u6700\u591a\u7684\u6587\u4ef6\u6216\u9875\u9762,\u53d6\u524d20<\/h6>\n
cat access.log|awk '{print $11}'|sort|uniq -c|sort -nr|head -20<\/code><\/p>\n\u5217\u51fa\u4f20\u8f93\u6700\u5927\u7684\u51e0\u4e2aexe\u6587\u4ef6\uff08\u5206\u6790\u4e0b\u8f7d\u7ad9\u7684\u65f6\u5019\u5e38\u7528\uff09<\/h6>\n
cat access.log |awk '($7~\/.exe\/){print $10 \" \" $1 \" \" $4 \" \" $7}'|sort -nr|head -20<\/code><\/p>\n\u5217\u51fa\u8f93\u51fa\u5927\u4e8e200000byte(\u7ea6200kb)\u7684exe\u6587\u4ef6\u4ee5\u53ca\u5bf9\u5e94\u6587\u4ef6\u53d1\u751f\u6b21\u6570<\/h6>\n
cat access.log |awk '($10 > 200000 && $7~\/.exe\/){print $7}'|sort -n|uniq\u00a0-c|sort -nr|head -100<\/code><\/p>\n\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<\/h6>\n
cat access.log |awk '($7~\/.php\/){print $NF \" \" $1 \" \" $4 \" \" $7}'|sort -nr|head-100<\/code><\/p>\n\u5217\u51fa\u6700\u6700\u8017\u65f6\u7684\u9875\u9762(\u8d85\u8fc760\u79d2\u7684)\u7684\u4ee5\u53ca\u5bf9\u5e94\u9875\u9762\u53d1\u751f\u6b21\u6570<\/h6>\n
cat access.log |awk '($NF < 60 && $7~\/.php\/){print $7}'|sort -n|uniq -c|sort -nr|head -100<\/code><\/p>\n\u5217\u51fa\u4f20\u8f93\u65f6\u95f4\u8d85\u8fc7 30 \u79d2\u7684\u6587\u4ef6<\/h6>\n
cat access.log |awk '($NF >\u00a030){print $7}'|sort -n|uniq -c|sort -nr|head -20<\/code><\/p>\n\u7edf\u8ba1\u7f51\u7ad9\u6d41\u91cf\uff08GB)<\/h6>\n
cat access.log |awk '{sum+=$10} END {print sum\/1024\/1024\/1024}'<\/code><\/p>\n\u7edf\u8ba1404\u7684\u8fde\u63a5<\/h6>\n
awk '($9 ~\/404\/)' access.log | awk '{print $9,$7}' | sort<\/code><\/p>\n\u7edf\u8ba1HTTP\u72b6\u6001\u7801<\/h6>\n
cat access.log |awk '{counts[$(9)]+=1}; END {for(code in counts) print code, counts1}'<\/code><\/p>\ncat access.log |awk '{print $9}'|sort|uniq -c|sort -rn<\/code><\/p>\n\u6570\u636e\u5e93\u7bc7<\/h6>\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'<\/pre>\n\u4ee5\u4e0a\u8fd9\u4e9b\u547d\u4ee4\/\u6280\u5de7\u90fd\u662f\u4ece\u7f51\u4e0a\u641c\u96c6\u800c\u6765\uff0c\u4f46\u81ea\u5df1\u90fd\u8fdb\u884c\u4e86\u6d4b\u8bd5\uff0c\u5982\u679c\u5728\u4f60\u7684\u7cfb\u7edf\u4e2d\u5b58\u5728\u95ee\u9898\u7684\u8bdd\uff0c\u8bf7\u6839\u636e\u5177\u4f53\u60c5\u51b5\u8fdb\u884c\u4e9b\u8bb8\u4fee\u6539\u5373\u53ef\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
#\u5220\u9664\u5f53\u524d\u6587\u4ef6\u5939\u4e2d\u5927\u5c0f\u4e3a0\u7684\u6587\u4ef6 $ find . -type f -size 0 -exec rm -rf […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,11,12],"tags":[74,158,30,159,78],"class_list":["post-331","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-linux","category-tools","tag-awk","tag-basename","tag-linux","tag-netstat","tag-sed"],"views":3922,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/331","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=331"}],"version-history":[{"count":0,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/331\/revisions"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=331"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}