Re: Some real simple questions regarding sockets

From: Barry Margolin (barry.margolin_at_level3.com)
Date: 10/23/03 

Date: Thu, 23 Oct 2003 17:53:24 GMT

In article <yw1x8ynbhmu8.fsf@kth.se>, Måns Rullgård <mru@kth.se> wrote:
>nimmi_srivastav@yahoo.com (Nimmi Srivastav) writes:
>
>> What's the best way to know which application is using a certain TCP
>> or UDP port number from the OS shell?
>
>netstat -p

On my Solaris 2.6 system that prints

Net to Media Table
Device IP Address Mask Flags Phys Addr
------ -------------------- --------------- ----- ---------------
le0 router 255.255.255.255 00:04:de:82:cb:57
le0 wob-dhcp177-088 255.255.255.255 00:d0:59:11:b4:15
le0 tools 255.255.255.255 SP 08:00:20:89:c7:c9
le0 base-address.mcast.net 240.0.0.0 SM 01:00:5e:00:00:00

which is the same as "arp -a". This is clearly not what the OP was looking
for.

The answer that works on just about every flavor of Unix is to use "lsof".
If it's not already on your system, it's available for download from a
variety of places (for Sun's, you can get it from www.sunfreeware.com). 

-- 
Barry Margolin, barry.margolin@level3.com
Level(3), Woburn, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.

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