port already used

[sameer_4]

Hi,
i am installing one appplication which requires a particular port to be installed on but it says port is already occupied..but i dont see that port occupied in netstat -an or lsof o/p.Any ideas how can i find out why this is happening.


thnks

[Tom Geudens]

Hi,
Check /etc/services to see if the port is already in use. Most application-installs just add lines in there.

If your application checked this ... it is a very nice application indeed :-)

Hope this helps,
Tom

[Steven Sim Kok Leong]

Hi,

You should be able to see the port used in your lsof output.

# lsof -i

Hope this helps. Regards.

Steven Sim Kok Leong

[Alex Glennie]

also make sure you run lsof -i : as the root user

[sameer_4]

I checked the same it is not available in /etc/services.

[T G Manikandan]

There are startup scripts on the server which startup various services and reserve them to use a port.
So when your application is trying to configure that port
"port already in use"

You can supress and make use the port for your application by making an entry in the /etc/services file,but it is quite neccessary to find the application that is currently using that port.

What is the port number that the application is trying to use.

Thanks

[sven verhaegen]

unfortunately to say that the /etc/services file is but a 'doc' type of file , it holds a descriptor for the well known ports and some others but the system isn't going to reserve the port because you put it in there , it just doesn't work like that , if lsof doesn't see the socket that is strange i do agree that lsof -i should show it at least

[V. V. Ravi Kumar_1]

hi,

use lsof -i:
if doesn't give any output, then check that port is listed in /etc/services, it not, try adding that in /etc/services.

regds

[sameer_4]

the port nos. are 6848,6849

[U.SivaKumar_2]

Hi,
Those ports mentioned are used by ADP payroll
application , do you use that ?.
IF not please tell us about the applications you are running in the server ?. Also Is this
server a DNS client ?.

regards,
U.SivaKumar