topic Re: Which process is using which port in Operating System - HP-UX

Which process is using which port

Adwait — Mon, 10 Dec 2007 14:52:31 GMT

In HPUX, if I want to know which process is using port=4000, then how do I get this information.

Re: Which process is using which port

Steven E. Protter — Mon, 10 Dec 2007 15:00:55 GMT

Shalom,

Best bet is to install lsof.

losf is found.

http://hpux.cs.utah.edu/hppd/hpux/Sysadmin/lsof-4.78/

SEP

Re: Which process is using which port

Robert-Jan Goossens — Mon, 10 Dec 2007 15:03:02 GMT

Hi,

Lsof is usefull tool.

http://hpux.connect.org.uk/hppd/hpux/Sysadmin/lsof-4.78/

# lsof -i tcp:4000

Regards,
Robvert-Jan

Re: Which process is using which port

Adwait — Mon, 10 Dec 2007 16:03:50 GMT

Thanks guys, but is there any other way, since I do not have lsof tool installed on the servers.

Re: Which process is using which port

A. Clay Stephenson — Mon, 10 Dec 2007 16:10:37 GMT

You can use netstat to determine that a given port is in use on a box but that doesn't tell you anything about which process is using the port. Lsof is the tool for this and it's one of those tools that should be installed on every UNIX box. The installation is very easy.

Re: Which process is using which port

Robert-Jan Goossens — Mon, 10 Dec 2007 16:14:23 GMT

It is one of those basic tools you should install on all your servers.

You can try netstat, but there is a change netstat will only report that the port is in use.

# netstat -an | grep 4000

example below.

# netstat -an | grep 65154
tcp4 0 0 *.65154 *.* LISTEN
# lsof -i tcp:65154
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 430100 was 255u IPv4 0xf100020003cc3390 0t0 TCP *:65154 (LISTEN)

Regards,
Robert-Jan

Re: Which process is using which port

Torsten. — Mon, 10 Dec 2007 16:17:56 GMT

There is nothing better than lsof!

Example for port 2301:

# lsof -i :2301
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
smhstartd 2270 root 3u IPv4 0x2970880 0t0 TCP *:2301 (LISTEN)

Download and install this tool.

Re: Which process is using which port

Jeeshan — Mon, 10 Dec 2007 18:30:40 GMT

You can do the followings

1. Check the /etc/services file to see which for which service which port are used.
2. netstat -an|grep 4000
3. or you can do lsof.