port useage hpux 11i

[Donald Thaler]

i'm trying to find what application is using a specific port. I see references to a command 'lsof' but this command doesn't work on my hp ux11i box(pa risc 64). I tried the netstat -an|grep 3938 but that just told me it was in use.

[James A. Donovan · Accepted solution]

You can try downloading the source code for lsof and/or a copy of the pre-compiled binary from here:

http://ftp.cerias.purdue.edu/pub/tools/unix/sysutils/lsof/

[John Dvorchak]

when you say "it doesn't work" do you mean you can't find it? You might try this link and download the binary, unzip it, and put in in your path like /usr/sbin or /usr/local/sbin.

http://ftp.br.xemacs.org/pub/unix-tools/lsof/binaries/hpux/

[Sandman!]

Hi Donald,

netstat -an will give you the port usage also, however it could be listing a port on a remote system also. You need to be specific on your filtering criteria i.e.

# netstat -an | awk '{if(z[split($4,z,".")]==3938) print $0}'

...the awk construct splits $4 (Local Address) and compares the port no. to the last split-field. Or use lsof, downloading it from http://hpux.cs.utah.edu/, as:

# lsof -i:3938

the benefit of lsof is that it gives the process that's listening/bound to that port.

hope it helps!