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lsof is a command listing open files.

$ cat > /tmp/LOG &cat > /tmp/LOG &[1] 18083$ lsof -p 18083lsof -p 18083COMMAND   PID   USER   FD   TYPE DEVICE  SIZE/OFF     NODE NAMEcat     18083 yamato  cwd    DIR   0,44      1580 43460784 /tmp/lsofcat     18083 yamato  rtd    DIR  253,2      4096        2 /cat     18083 yamato  txt    REG  253,2     47432   678364 /usr/bin/catcat     18083 yamato  mem    REG  253,2 111950656   681778 /usr/lib/locale/locale-archivecat     18083 yamato  mem    REG  253,2   2119256   679775 /usr/lib64/libc-2.27.socat     18083 yamato  mem    REG  253,2    187632   655943 /usr/lib64/ld-2.27.socat     18083 yamato  mem    REG  253,2     26370   662532 /usr/lib64/gconv/gconv-modules.cachecat     18083 yamato  mem    REG  253,2      3316  1578981 /usr/lib/locale/en_US.utf8/LC_TIMEcat     18083 yamato    0u   CHR  136,3       0t0        6 /dev/pts/3cat     18083 yamato    1w   REG   0,44         0 54550934 /tmp/LOGcat     18083 yamato    2u   CHR  136,3       0t0        6 /dev/pts/3

Read the documentation atlsof.readthedocs.io

The lsof-org team at GitHub takes over the maintainership of lsof originallydeveloped and maintained by Vic Abell. This repository is for maintaining thefinal source tree of lsof inherited from Vic. "legacy" branch keeps the originalsource tree. We will not introduce any changes to the "legacy" branch. Thisbranch is just for reference.

"master" branch is used for maintenance. Bug fixes and enhancements go to"master" branch.

lsof had supported many OSes. A term "dialect" represents code for supportingOSes. Because of limited resources, we will maintain the part of them. Thecurrent status of maintenance is as follows:

FreeBSD

fully maintained and tested on Cirrus CI

Linux

fully maintained, and tested on Circle CI

Darwin

fully maintained, and tested on Circle CI

NetBSD

fully maintained, and tested on SourceHut CI

OpenBSD

fully maintained, and tested on SourceHut CI

Solaris/OpenIndiana

fully maintained

If you are interested in maintaining a dialect, let us know via the issuetracker of GitHub (https://github.com/lsof-org/lsof/issues). If we cannot find avolunteer for a dialect, we will remove the dialect.

Many texts in the source tree still refers purdue.edu as the home of lsofdevelopment. It should behttps://github.com/lsof-org/lsof, the new home. Theupdating is in progress.

We ran another repository, lsof-org/"lsof-linux" derived from lsof-4.91 that wasalso released by Vic. The repository is no more used; all the changes made inthe repository are now in lsof-org/"lsof" repository.

The lsof-org team at GitHub