lsof is a tool to list open files of processes

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40
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5answers
74k views

Determining what process is bound to a port

I know that using the command: lsof -i TCP (or some variant of parameters with lsof) I can determine which process is bound to a particular port. This is useful say if I'm trying to start ...
30
votes
6answers
9k views

Who's got the other end of this unix socketpair?

I want to determine which process has the other end of a UNIX socket. Specifically, I'm asking about one that was created with socketpair(), though the problem is the same for any UNIX socket. I ...
24
votes
2answers
23k views

lsof and listening ports

I am trying to get all the processes listening for a network connection on Mac OS X. netstat does not have the -p option and I am trying with lsof lsof -i -sTCP:LISTEN gives me a fair list of ...
15
votes
1answer
9k views

How do I monitor opened files of a process in realtime?

I know I can view the open files of a process using lsof at that moment in time on my Linux machine. However, a process can open, alter and close a file so quickly that I won't be able to see it when ...
13
votes
4answers
54k views

Alternatives for “lsof” command?

In many cases "lsof" is not installed on the machines that with I have to work, but the "function" of lsof would be needed very much (ex. on AIX). :\ Are there any "lsof" like applications in the ...
11
votes
5answers
12k views

Under AIX, how can I get the full path of a program bound to a port?

Under Linux I can use netstat -tulpnw and ps, like so: # netstat -tulpnw | grep :53 tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN 1482/named udp ...
9
votes
1answer
4k 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 ...
8
votes
2answers
1k views

lsof - age of file

The *nix command lsof gives you a list of open files. Is anyone aware of a way that would also list how long a particular file has been open? Either by using lsof or any other command. I'm using ...
7
votes
2answers
2k 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 ...
7
votes
2answers
1k 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 ...
6
votes
3answers
23k views

How to interpret this output of lsof command?

root@host [/home2]# lsof /home2 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME php 3182 ctxmortg cwd DIR 8,17 4096 32858196 /home2/ctxmortg/public_html/hello php ...
6
votes
3answers
3k views

Faster alternatives to lsof

I want to extract the process id of a certain process in order to shut it down. The process is a local web server using a certain port (localhost:3000), and I am currently doing it like this to ...
5
votes
3answers
2k views

How can I know the process name which is opening a tcp port?

I have two linux servers. Let's say they are C and S. C is client of S On my S machine, I type. $ netstat -an | grep ESTABLISHED tcp 0 0 192.168.1.220:3306 C:57010 ...
5
votes
3answers
13k 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 ...
5
votes
2answers
3k 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: ...
4
votes
3answers
3k views

How do I get a mapping of Pid to Port?

I have a process which I need to run on a specific port. I have started some other process on that port and I need to kill it. Unfortunately, I don't remember the name/pid of the other process so I ...
4
votes
1answer
347 views

lsof doesn't return files open by the same user

Consider this simple scenario: I open a text file ~/textfile.txt with vim in one terminal (tried with both edit and read-only modes). In a different terminal, I run /usr/sbin/lsof ~/textfile.txt ...
4
votes
2answers
2k views

What's the difference between lsof and fuser -uvm

Both shows the number of files we're using. Yet they both shows different results. root@host [~]# lsof /home4 root@host [~]# lsof /home2 root@host [~]# lsof /home4 Then we got fuser -uvm /home4 ...
4
votes
1answer
951 views

What do GDIR, GREG, VDIR, VREG mean in lsof output

The lsof manpage says the following about the TYPE column. TYPE is the type of the node associated with the file - e.g., GDIR, GREG, VDIR, VREG, etc. Can someone please explain (or point ...
4
votes
1answer
526 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 ...
4
votes
3answers
763 views

How to tell if a file is being downloaded by wget?

I use wget to download files (most are zip files) automatically for me during the night. However, sometimes in the morning I find that a few files cannot be unzipped. I don't know why this is ...
4
votes
1answer
27 views

understanding lsof during long operation on big file

Background I'm running Musicbrainz Picard to update a ~11M ogg file on a 500GB NTFS disk (Transcend StoreJet) connected via USB and mounted using autofs. The connection is through docking station. ...
3
votes
2answers
7k views

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() ...
3
votes
1answer
214 views

Should I be concerned with large (deleted) files in lsof? [duplicate]

We've been working to clean up some space in our /opt mount. A large culprit of space consumption was log files for some processes we run (to the tune of 2 to 12 GB each). We've cleaned these up by ...
3
votes
1answer
2k 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 ...
3
votes
1answer
119 views

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 ...
3
votes
2answers
435 views

Mac drive in use, understanding lsof

I am trying to repair permissions on my external HD. I cannot empty my trash when it is plugged in, because I get a bunch of "such file is in use". I read online that this might be resolved by ...
3
votes
1answer
317 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 ...
3
votes
1answer
54 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 ...
3
votes
1answer
50 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
votes
1answer
120 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 ...
3
votes
1answer
897 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 \ ...
3
votes
1answer
62 views

How to call lsof properly to retrieve all TCP connections?

# lsof -n -itcp | wc 92 919 10212 # lsof -n | grep TCP | wc 2482 27222 373861 What I'm doing wrong with lsof -itcp ? Such calling is skipping part of connections, looks like this ...
2
votes
2answers
572 views

How to use lsof to identify incoming TCP connections?

I want to know if my server establishes a connection to a remote server or if the remote server tries to reach my server. I tried to read the output of lsof and obtain this information: lsof -i ...
2
votes
2answers
268 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 ...
2
votes
3answers
245 views

How to iterate through files and delete those older than x days but NOT in use

So, I've been able to figure out bits of this myself but am having trouble piecing them together. I have a task I need to automate - I have folders filled with gigabytes of obsolete files, and I want ...
2
votes
1answer
185 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}} ...
2
votes
1answer
44 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
votes
1answer
130 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 ...
2
votes
3answers
237 views

lsof -p PID vs lsof | grep PID

I do not understand the ouput of the lsof command. When i write lsof -p PID I get 4 lines and when I write lsof | grep PID I get hundreds of lines. Shouldn't it return the same result? ...
2
votes
1answer
144 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 ...
2
votes
1answer
74 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 ...
2
votes
2answers
2k views

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 ...
2
votes
1answer
445 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
votes
1answer
338 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 ...
2
votes
2answers
847 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 ...
2
votes
0answers
2k 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 ...
2
votes
0answers
268 views

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 ...
2
votes
0answers
177 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 ...
2
votes
0answers
400 views

Information about the 1630/master app

When I run $ sudo netstat -a --programs | grep LISTENING | grep 1630 I will get this output. Do you know what good are processes running under this app name? Why they I running on my system and if ...