lsof is a tool to list open files of processes

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How does `lsof` keep track of open file descriptors' filenames?

I've noticed, if a file is renamed, lsof displays the new name. To test it out, created a python script: #!/bin/python import time f = open('foo.txt', 'w') while True: time.sleep(1) Saw that ...
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28 views

More succinct alternative to “lsof -p $(pidof postgres| sed -r 's/ /,/g')”

pidof returns a space separated list of pids. lsof -p requires a comma serparated one. This can be solved with sed via: lsof -p `pidof postgres| sed -r 's/ /,/g'` However, the extra pipe seems a ...
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24 views

lsof vs cat/proc/…/maps [closed]

While looking for a detection method for services that would need to be rstarted after patching OpenSSL, I stumbled over a difference between the return of those 2 commands : [root@host ~]# cat ...
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2answers
63 views

Mac drive in use, understanding lsof

I am trying to repair permission on my external HD as I can not empty my trash when its plugged in because I get a bunch of "such file is in use". I read online that this might be resolved by ...
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2answers
49 views

lsof to identify incomming TCP connection

I which to know if my server establish a connection to a remote server or if the remote server tries to reach my server, I try to read the output of lsof and obtain this: lsof -i TCP:25 USER FD ...
2
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1answer
36 views

What exactly is a file offset in lsof output?

I was using lsof to track down deleted files that were still taking up space and I realized that I wasn't quite sure what an offset is with respect to a file. lsof's man page was less than helpful in ...
3
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1answer
34 views

Get all files open for writing with pid, recursively

Given a pid, I can get all the files open for writing something like: lsof -p 28827 | awk '$4 ~ "[wW]"{print $(NF-1), $NF}' One of those ends up being a pipe: 28827 232611 pipe I want to look-up ...
3
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1answer
132 views

Command for killing specific PID provided by previous command

Sometimes I need to kill a process (the reasons why are not important). And I know I can find that process with the following command: lsof -i :8080, being my candidate the last process in the output ...
2
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1answer
43 views

Discrepancy with lsof command when trying to get the count of open files per process

I am trying to get a list of open files per process. I ran the following one-liner from PerlMonks: lsof | perl -lane '$x{"$F[0]:$F[1]"}++; END { print "$x{$_}\t$_" for sort {$x{$a}<=>$x{$b}} ...
3
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45 views

What is an 'executing text reference'?

In the lsof man page, there is the following sentence: An open file may be a regular file, a directory, a block special file, a character special file, an executing text reference, a library, a ...
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1answer
476 views

lsof: no pwd entry for UID

I'm trying to run command lsof |grep services on my Solaris 10 to find any processes that have big files which are using up the disk space but i got a bunch of lines saying: lsof: no pwd entry for ...
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1answer
50 views

Why can `lsof -i` not show an open connection which `netstat -n` lists?

A strange situation. I started telnet 0 8081 and lsof -i (run under root) doesn't list this connection, but netstat -n does. Why can this be?
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84 views

TCP connections in SYN_SENT not visible with lsof

I have lots of connections in SYN_SENT: $ conntrack -L | grep -c 'SYN_SENT' conntrack v1.2.1 (conntrack-tools): 28100 flow entries have been shown. 14017 But I can't see which process(es) are ...
3
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1answer
55 views

log PID of each connection attempt

Finding the PID of an established connection is trivial using netstat or lsof. However, I have a process which is creating a connection ever 60 seconds to our database and locking it up by maxing out ...
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1answer
202 views

lsof: measure I/O rate of a socket fd

I'm writing a script that parses the output of lsof to show a list of what processes have sockets open (similar to what netstat shows). lsof also gives me a file descriptor. What I want to do now is ...
2
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1answer
156 views

how to find out the full path of the command from the result of lsof -i

lsof is a great utility, just now started using it. lsof -i | grep smtp => this give the following result. httpd.pl 212548 global 3u IPv4 893092369 0t0 TCP ...
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712 views

File limits getrlimit(RLIMIT_NOFILE) failed

(32-bit system) Posted a Q/A earlier regarding Chrome crashing because of exhausted limit in open files. Chrome has since run more smooth, (after increasing limit), but still crashes from time to ...
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3answers
715 views

Best way to free disk space from deleted files that are held open

Hi I have many files that have been deleted but for some reason the disk space associated with the deleted files is unable to be utilized until I explicitly kill the process for the file taking the ...
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3answers
286 views

How do I detect running processes using a library package?

This command is doing the rounds for detecting currently running processes using glibc: lsof | grep libc | awk '{print $2}' | sort | uniq I find it intensely annoying, since /libc/ matches not only ...
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1answer
47 views

lsof misses files

Why does lsof fail to list files I have open. For example I open with the text editor some file in my home directory. $ gedit ~/.python_history lsof does not even work as root $ sudo lsof | grep ...
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1answer
61 views

Different output of lsof variant [closed]

I have a Java application utilizing the MongoDB Java driver (2.11.3). I'm using one static MongoClient instance across the whole application and as stated in the docs it should handle the connection ...
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115 views

Why doesn't syslog traffic show up in netstat and lsof output?

I've noticed on my CentOS 5.x system that outbound syslog traffic (UDP) doesn't show up in lsof or netstat results. I've even tried stuff like watch -n .1 'netstat -l -u -n --program' to make sure ...
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2answers
720 views

Move file but only if it's closed

I want to move large file created by external process as soon as it's closed. Is this test command correct? if lsof "/file/name" then # file is open, don't touch it! else if [ 1 -eq ...
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2answers
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lsof: WARNING: can't stat() fuse.gvfsd-fuse file system

What exactly is happening here? root@bob-p7-1298c:/# ls -l /tmp/report.csv && lsof | grep "report.csv" -rw-r--r-- 1 mysql mysql 1430 Dec 4 12:34 /tmp/report.csv lsof: WARNING: can't stat() ...
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1answer
121 views

How do I figure out what is preventing a bind mount from unmounting?

I have a problem with a mountpoint being too busy to unmount. Normally, lsof or fuser would tell me what process is using it, but this is a bind mount, so lsof and fuser show what is using both the ...
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1answer
80 views

Failed to list directory contents: process waits infinitely

I use Linux Mint 13, and sometimes (rarely) I find myself not being able to list my home directory contents. When I try to do so: $ cd $ ls then, ls just waits indefinitely. The same with any other ...
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lsof: home folder is busy, but I never logged in as that user

I'm trying to run ecryptfs-migrate-home to encrypt my home folder, but the command keeps failing the open files check. Indeed, lsof +D "/home/will" shows the same in-use files as ...
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2answers
172 views

How to capture the port number from this `lsof -F` output using awk (or something better)?

I've got output coming from lsof -F that looks like this: p7646 g7646 R8300 csocat u1000 Labe f3 au l tIPv4 G0x80002;0x0 d640391 o0t0 PTCP n*:51352 TST=LISTEN TQR=0 TQS=0 I am trying to capture the ...
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1answer
1k views

Monitoring files continuously with lsof

Is there a way to make lsof work continuously to monitor every file that is being opened in real time? I don't know the name of the process. I want lsof to work continuously for a period of time ...
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31 views

rogue ssh (+svn?) process trying to connect to a remote server

I am using a remote server via ssh, svn, and sometimes with FileZilla all running on Mac OS 10.9.4. I connect to the server with no problems (i.e. my credentials pass every time I enter them). ...
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74 views

List only commands with lsof

I tried with lsof -F c somefile But I get p1 cinit p231 cmountall p314 cupstart-udev-br p317 cudevd Instead of init mountall ... Any way to get just the command?
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104 views

How to determine the newly closed file within a continuous audit log rotation?

I am attempting to find the best way to determine when the second file (of a matching criteria) is created. The context is an audit log rotation. Given a directory where audit logs are created every ...
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145 views

ls does not show a hidden file (OS X)

I am using lsof to view the list of open files. One such file that it displays open is : Google 3864 malaykeshav 46u REG 1,1 470455334 32578671 ...
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2answers
608 views

FreeBSD 10 trace disk activity

Is there any way to find some process which is periodically writing to disk (according to hdd led) on FreeBSD 10 with ZFS (maybe turn ZFS into verbose logging mode)? lsof and other instantly ...
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1answer
37 views

Limiting readers on a pipe

I want to use a pipe to pass some security credential information from "process1" to another script. I only want authorized reader processes to be permitted to read the pipe. I am thinking I will ...
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1answer
2k views

how to get the stream URL of flash radio

I am listening to a radio stream (flash content in a browser). I want to play this stream directly with mplayer or the like. Doing lsof -ni shows me these two lines (among others): plugin-co 13248 ...
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1answer
83 views

run lsof in non-interactive mode

I need to write lsof output for several network ports into bash variable. Simple $(lsof -i :5555) doesn't work - lsof waits for quit command (Ctrl-C) every time I call it. I can't figure out how to ...
2
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1answer
39 views

Forcing compton to free directory

I often have trouble unnounting filesystems because compton is keeping a subdirectory open. Here is one line from lsof I have right now: compton 30043 valmi cwd DIR ...
2
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1answer
89 views

link count of deleted files

I am reading in man lsof that +L enables the listing of file link counts. A specification of the form "+L1" will select open files that have been unlinked. I don't understand why deleted files ...
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2answers
208 views

what process is listening on a given port

I have several problems: some process is attempting to send data and the firewall is rejecting it at the rate it is sending it out firewall logs flood the system (may need to rate-limit the logging) ...
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1answer
1k views

Memcache 'stats' reports non-zero 'curr_connections' - but lsof shows no socket connections

Our memcache daemon reports non-zero 'curr_connections'... $ telnet memcache-server 11211 Escape character is '^]'. stats ... STAT curr_connections 12 ... ...and yet, lsof shows no socket ...
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1answer
188 views

understanding lsof -i output with web browsing

Sorry, if my question is nooby, but i don't understand some output lsof command. I try to run lsof -i on my home machine(debian linux) and what i obtain (showed one line; my browser chromium was ...
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1answer
2k views

root permission denied on /proc/1/exe

I just performed a fresh ubuntu install and i am seeing the following in lsof: userA@az1:~$ lsof COMMAND PID TID USER FD TYPE DEVICE SIZE/OFF NODE NAME init 1 ...
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2answers
2k views

lsof: show files open as read-write

When I try to remount a partition as read-only, I get an error /foo is busy. I can list all files open from /foo with lsof /foo but that does not show me whether files are open read-only or ...
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2answers
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lsof - debug the output information

I was going through the questions of this site. In this particular question, I see the command lsof being used to list the files that are open for a particular user. I ran the below command in my ...
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1answer
443 views

How do I update lsof port on FreeBSD 9.2?

It threw errors about kernel sources missing. So, I looked and sure enough this box doesn't have them. The documentation I have says to install them via sysinstall. That failed both automatically ...
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2answers
2k views

fuser vs lsof to check files in use

I've been getting some suggestions on how to figure out why my serial port is busy. Specifically, when I try to start gammu-smsd, it refuses to start on /dev/ttyS0 because it says that port is busy: ...
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1k views

When looking at lsof output, what does “0t0” mean?

When looking at lsof output, what does "0t0" mean?
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115 views

How to increase the link count for a directory, link count went to 0?

I have made myself land in this situation, it is a chrooted workspace on my system where I virtualize the entire file system ( so its not actual /var/log ) Is there a way that I can either delete this ...
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1answer
650 views

How can I figure out which pty's are from which qemu?

I'm running qemu's like this: $ sudo qemu -boot d -m 1024 \ -netdev tap,id=tap0 \ -device virtio-net-pci,netdev=tap0,id=vth0 \ -drive file=ubuntu.iso,media=cdrom,cache=none,if=ide \ -monitor pty \ ...