On Thu, 24 Jun 1999, Bryan Andersen wrote:
> Anybody know how to findout which process has what ports open under
> Linux or OpenBSD? Or for that matter any other OS.
Compile and install a copy of lsof. The program will list *all* open
filehandles on the box, as well as the process with them open. Sockets
are filehandles too. You'll be able to list Unix domain (named pipes),
Internet domain and regular filehandles at will. It's one of those
few programs I consider a necessary install on any *nix box I administer.
ftp://vic.cc.purdue.edu/pub/tools/unix/lsof/
You want a version > 4.40 and probably to make sure only select users can
execute it anyway. V4 is currently tested on:
AIX 4.1.[45], 4.2[.1], and 4.3[.12]
BSDI BSD/OS 2.1 and 3.[01] for Intel-based systems
DC/OSx 1.1 for Pyramid systems
DEC OSF/1, Digital UNIX, Tru64 UNIX 2.0, 3.2, 4.0, and 5.0
FreeBSD 2.1.[67], 2.2[.x], 3.[012], and 4.0 for Intel-based
systems
HP-UX 9.01, 10.20, and 11.00
Linux 2.0.3[2346], 2.1.x, and 2.2.x for Intel-based systems
NetBSD 1.[234] for Intel and SPARC-based systems
NEXTSTEP 3.[13] for NEXTSTEP architectures
OpenBSD 2.[012345] for Intel-based systems
OpenStep 4.x
Reliant UNIX 5.4[34] for Pyramid systems
SCO OpenServer Release 3.0 and 5.0.[0245] for Intel-based
systems
SCO UnixWare 2.1.[123] and 7[[.0].1] for Intel-based systems
Sequent PTX 2.1.9, 4.2.[13], 4.[34], and 4.4.[124]
Solaris 2.5.1, 2.6, and 7
SunOS 4.1.x
Ultrix 4.2
Under Linux, /proc/net/{raw,tcp,udp,unix} will give you the UID of the
owning process, I'm not sure if the PID is available or not having not
dug though /proc in a while.
Paul
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