Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Check whether port is used

Posted on 2006-07-24
3
Medium Priority
?
389 Views
Last Modified: 2013-12-27
We are using a report server that listens on port 8001. If we start the report server (through a script) a second time, it will fail because port 8001 is already taken up by the first instance. How can I modify my script to check that the port is already taken up, so that I won't start the server again?

I can use telnet, but it's going to prompt me to enter something. All I need is to check that the server is listening on that port.
0
Comment
Question by:yongsing
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
3 Comments
 
LVL 16

Accepted Solution

by:
Hanno P.S. earned 200 total points
ID: 17167907
a short
  netstat -an | grep 8001
should show you
0
 
LVL 16

Expert Comment

by:Hanno P.S.
ID: 17167922
Status like idle, listen, established shwo that somthing bound to it already.
0
 
LVL 16

Expert Comment

by:Hanno P.S.
ID: 17168077
If you are looking for a certain port for a given process ID (pid) use
# pfiles $pid | grep "sockname:" | grep "port:" | awk '{print $NF}'`

If you need a report for ALL ports, run this script:
#!/bin/ksh
for pid in `ps -ef -o pid | tail +2` ; do
 port=`pfiles $pid 2>&1 | grep "sockname:" | grep "port:" | awk '{print $NF}'` > /dev/null
 [ ! -z "$port" ] &&  echo "`pfiles $pid 2>&1 | grep \"^$pid:\"` => `echo $port`"
done

JustUNIX
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Attention: This article will no longer be maintained. If you have any questions, please feel free to mail me. jgh@FreeBSD.org Please see http://www.freebsd.org/doc/en_US.ISO8859-1/articles/freebsd-update-server/ for the updated article. It is avail…
Installing FreeBSD… FreeBSD is a darling of an operating system. The stability and usability make it a clear choice for servers and desktops (for the cunning). Savvy?  The Ports collection makes available every popular FOSS application and packag…
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…
Suggested Courses

721 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question