Commands tagged lsof (35)

  • Imagine you've started a long-running process that involves piping data, but you forgot to add the progress-bar option to a command. e.g. xz -dc bigdata.xz | complicated-processing-program > summary . This command uses lsof to see how much data xz has read from the file. lsof -o0 -o -Fo FILENAME Display offsets (-o), in decimal (-o0), in parseable form (-Fo) This will output something like: . p12607 f3 o0t45187072 . Process id (p), File Descriptor (f), Offset (o) . We stat the file to get its size stat -c %s FILENAME . Then we plug the values into awk. Split the line at the letter t: -Ft Define a variable for the file's size: -s=$(stat...) Only work on the offset line: /^o/ . Note this command was tested using the Linux version of lsof. Because it uses lsof's batch option (-F) it may be portable. . Thanks to @unhammer for the brilliant idea. Show Sample Output

    F=bigdata.xz; lsof -o0 -o -Fo $F | awk -Ft -v s=$(stat -c %s $F) '/^o/{printf("%d%%\n", 100*$2/s)}'
    flatcap · 2015-09-19 22:22:43 1
  • Say you're started "xzcat bigdata.xz | complicated-processing-program >summary" an hour ago, and you of course forgot to enable progress output (you could've just put "awk 'NR%1000==0{print NR>"/dev/stderr"}{print}'" in the pipeline but it's too late for that now). But you really want some idea of how far along your program is. Then you can run the above command to see how many % along xzcat is in reading the file. Note that this is for the GNU/Linux version of lsof; the one found on e.g. Darwin has slightly different output so the awk part may need some tweaks. Show Sample Output

    f=bigdata.xz; calc "round($(lsof -o0 -o "$f"|awk '{o=substr($7,3)}END{print o}')/$(stat -c %s "$f")*100)"
    unhammer · 2015-09-19 18:27:12 3
  • us lsof, grep for any pid matching a given name such as "node". Show Sample Output

    lsof -i -n -P | grep -e "$(ps aux | grep node | grep -v grep | awk -F' ' '{print $2}' | xargs | awk -F' ' '{str = $1; for(i = 2; i < NF; i++) {str = str "\\|" $i} print str}')"
    hochmeister · 2015-02-14 23:24:00 3
  • While the posted solution works, I'm a bit uneasy about the "%d" part. This would be hyper-correct approach: lsof|gawk '$4~/txt/{next};/REG.*\(deleted\)$/{sub(/.$/,"",$4);printf ">/proc/%s/fd/%s\n", $2,$4}' Oh, and you gotta pipe the result to sh if you want it to actually trim the files. ;) Btw, this approach also removes false negatives (OP's command skips any deleted files with "txt" in their name).

    lsof|gawk '$4~/txt/{next};/REG.*\(deleted\)$/{printf ">/proc/%s/fd/%d\n", $2,$4}'
    wejn · 2014-03-11 10:40:32 5
  • Inner "ps...grep..." command searches for a process matching the specified . "lsof -p lists all file descriptors owned by . Includes open files, sockets, devices, etc... Show Sample Output

    sudo lsof -p `sudo ps aux | grep -i neo4j | grep -v grep | awk '{ print $2 }'`
    andycunn · 2013-06-02 10:15:30 1
  • Fast and easy way to find all established tcp connections without using the netstat command.

    lsof -i -n | grep ESTABLISHED
    techie · 2013-04-03 09:14:09 0
  • Shows which applications are making connections, and the addresses they're connecting to. Refreshes every 2 seconds (watch's default). Test on OSX, should work anywhere watch and lsof work. Show Sample Output

    watch "lsof -i -P |grep ESTABLISHED |awk '{printf \"%15.15s \\t%s\\n\", \$1, \$9}'"
    skarfacegc · 2013-04-03 02:04:11 0
  • also could specify port number: lsof -ni TCP:80

    lsof -ni TCP
    tsener · 2013-03-20 22:51:16 0

  • 0
    lsof -i -P +c 0 +M | grep -i "$1"
    opexxx · 2013-03-19 10:42:15 0
  • Shows files and processes of the command php

    watch -d=c -n3 'lsof -itcp -iudp -c php'
    AskApache · 2013-03-14 01:24:50 0
  • See the summary. Show Sample Output

    lsof +c 15 | awk '{print $1}' | sort | uniq -c | sort -rn | head
    SEJeff · 2012-05-25 16:31:46 0
  • This option is much faster, as it checks only network nodes. Show Sample Output

    lsof -Pi | grep LISTEN
    5partan · 2011-10-03 12:50:18 0
  • This option selects the listing of all Internet and x.25 (HP-UX) network files. Show Sample Output

    lsof -i
    shsingh · 2011-10-03 02:06:30 0
  • Check open TCP and UDP ports Show Sample Output

    netstat -plntu
    bolthorn0 · 2011-10-01 12:16:38 0
  • While `lsof` will work, why not use the tool designed explicitly for this job? (If not run as root, you will only see the names of PID you own) Show Sample Output

    netstat -plnt
    DopeGhoti · 2011-09-30 19:56:32 0

  • 4
    lsof -Pn | grep LISTEN
    pykler · 2011-09-29 18:21:51 0
  • It may be helpful in case you need to umount a directory and some process is preventing you to do so keeping the folder busy. The lsof may process the +D option slowly and may require a significant amount of memory because it will descend the full dir tree. On the other hand it will neither follow symlinks nor other file systems.

    lsof +D <dirname>
    ztank1013 · 2011-09-18 00:01:25 0
  • Maybe this will help you to monitor your load balancers or reverse proxies if you happen to use them. This is useful to discover TIME OUTS and this will let you know if one or more of your application servers is not connected by checking. Show Sample Output

    watch -n 1 "/usr/sbin/lsof -p PID |awk '/TCP/{split(\$8,A,\":\"); split(A[2],B,\">\") ; split(B[1],C,\"-\"); print A[1],C[1],B[2], \$9}' | sort | uniq -c"
    ideivid · 2011-08-12 19:16:38 0
  • In addition to generating the current connections, it also opens then in your default browser on gnome.

    lsof -nPi | txt2html > ~/lsof.html | gnome-open lsof.html
    hippie · 2011-07-28 21:59:07 0
  • The output of lsof is piped to txt2html which converts it to html. # Perl module HTML::TextToHTML needed Show Sample Output

    lsof -nPi | txt2html > ~/lsof.html
    zlemini · 2011-07-28 14:01:21 4

  • 5
    lsof -i :22
    bucciarati · 2011-03-11 16:48:37 0
  • % lsof -v lsof version information: revision: 4.78

    lsof | awk '/*:https?/{print $2}' | sort -u
    sugitaro · 2011-02-04 01:37:17 0
  • Where COMMAND is the process(es) name. I prefer to get all states but you may add ESTABLISHED in the grep regex. lsof -c apache2 | egrep -o 'TCP.*ESTABLISHED.*$' -nP flags are optional and UDP is irrelevant for established connections Similar but using the process id: lsof -nP -p PID | egrep -o '(TCP|UDP).*$' Show Sample Output

    lsof -nP -c COMMAND | egrep -o '(TCP|UDP).*$' | sort -u
    forcefsck · 2011-01-25 12:04:13 0
  • Instead of using force un-mounting, it's better to find the processes that currently use the relevant folder. Taken from: Show Sample Output

    lsof /folder
    dotanmazor · 2010-09-06 05:10:06 0
  • for when a program is hogging the sound output. finds, and kills. add -9 to the end for wedged processes. add in 'grep ^program' after lsof to filter. Show Sample Output

    lsof /dev/snd/pcm*p /dev/dsp | awk ' { print $2 }' | xargs kill
    alustenberg · 2010-07-23 20:24:16 0
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