Commands tagged lsof (40)

  • show only the name of the apps that are using internet Show Sample Output

    lsof -P -i -n | cut -f 1 -d " "| uniq | tail -n +2
    edo · 2009-09-19 21:23:54 3
  • This command is more portable than it's cousin netstat. It works well on all the BSDs, GNU/Linux, AIX and Mac OS X. You won't find lsof by default on Solaris or HPUX by default, but packages exist around the web for installation, if needed, and the command works as shown. This is the most portable command I can find that lists listening ports and their associated pid. Show Sample Output

    lsof -Pan -i tcp -i udp
    atoponce · 2010-06-07 15:22:44 0
  • List all file opened by a particular command based on it's command name. Show Sample Output

    lsof -c dhcpd
    d4n3sh · 2009-04-17 07:18:38 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
  • Just refining last proposal for this check, showing awk power to make more complex math (instead /1024/1024, 2^20). We don't need declare variable before run lsof, because $(command) returns his output. Also, awk can perform filtering by regexp instead to call grep. I changed the 0.0000xxxx messy output, with a more readable form purging all fractional numbers and files less than 1 MB. Show Sample Output

    lsof -p $(pidof firefox) | awk '/.mozilla/ { s = int($7/(2^20)); if(s>0) print (s)" MB -- "$9 | "sort -rn" }'
    tzk · 2010-01-13 22:45:53 1
  • 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
  • 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
  • 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
  • Lis all files opened by a particular process id. "PID" Show Sample Output

    lsof -p 15857
    d4n3sh · 2009-04-17 07:16:03 0
  • Check which files are opened by Firefox then sort by largest size (in MB). You can see all files opened by just replacing grep to "/". Useful if you'd like to debug and check which extensions or files are taking too much memory resources in Firefox. Show Sample Output

    FFPID=$(pidof firefox-bin) && lsof -p $FFPID | awk '{ if($7>0) print ($7/1024/1024)" MB -- "$9; }' | grep ".mozilla" | sort -rn
    josue · 2009-08-16 08:58:22 3

  • 5
    lsof -i :22
    bucciarati · 2011-03-11 16:48:37 0

  • 4
    lsof -i | grep -i estab
    P17 · 2009-05-06 17:45:55 0
  • When trying to play a sound you may sometimes get an error saying that your sound card is already used, but not by what process. This will list all processes playing sound, useful to kill processes that you no longer need but that keep using your sound card. Show Sample Output

    lsof | grep pcm
    Miles · 2010-05-16 12:12:01 0

  • 4
    lsof -Pn | grep LISTEN
    pykler · 2011-09-29 18:21:51 0
  • change 24073 to your pid Show Sample Output

    lsof -nP +p 24073 | grep -i listen | awk '{print $1,$2,$7,$8,$9}'
    icreed · 2009-05-26 20:47:14 1
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • Check open TCP and UDP ports Show Sample Output

    netstat -plntu
    bolthorn0 · 2011-10-01 12:16:38 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
  • also could specify port number: lsof -ni TCP:80

    lsof -ni TCP
    tsener · 2013-03-20 22:51:16 0
  • 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
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Which processes are listening on a specific port (e.g. port 80)
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Find usb device
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Define Google Chrome urpmi media source for Mandriva/Mageia (works for both 32-bit and 64-bit systems)
This command adds a urpmi media source called "google-chrome" to the urpmi configuration on Mandriva or Mageia. Needs to be run as root. We specify the option "--update" so that when Google provides a newer version of Google Chrome web browser in their download system then running a system update (eg: "urpmi --auto-update") will result in our copy of Google Chrome getting updated (along with any other Mandriva/Mageia pending updates). To install Google Chrome from this source, use: urpmi google-chrome-stable #install Google chrome web browser

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Get AWS temporary credentials ready to export based on a MFA virtual appliance
You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Detect illegal access to kernel space, potentially useful for Meltdown detection
Based on capsule8 agent examples, not rigorously tested

execute your commands hiding secret bits from history records
$ wget --user=username --password="$password" Instead of hiding commands entirely from history, I prefer to use "read" to put the password into a variable, and then use that variable in the commands instead of the password. Without the "-e" and "-s" it should work in any bourne-type shell, but the -s is what makes sure the password doesn't get echoed to the screen at all. (-e makes editing work a bit better)

Copy ssh keys to [email protected] to enable password-less ssh logins.
Same as original just no $ at start

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