Cannot start Web Server on port 80 - Linux Mandrake 9.2
 

I am trying to get a web server running on port 80 on Linux Mandrake 9.2. I have tried various web servers and I get the same results. The error message I keep getting is "There's a listening error on port 80". Just to test the web servers, I changed the port to 8080 which works fine. The first thing I checked was the firewall. Unfortunately the problem is still occuring even though the firewall is disabled.

Could there be something else running on port 80? If so how do I find out what is running on this port? I searched the net for ways to do this and I found a few sites which gave me a command to run from Konsole. However if this is correct then it would appear that nothing is running on port 80.

If anyone can possibley help on this I would be extremely grateful. I'm no stranger to computers but have never really used Linux properly before.

Many thanks

Do this:

This should list something like:
"80/tcp: 9456"
Here 9456 is the PID of the process who occupies port 80.
Now do:
And there should be the programm you are looking for.
It might be that the "grep 9456" process is listed also ,
that's because you did a simple grep through the contents of the output of "ps ax"

This should get you going.

fuser command not found
 

Thanks for your help. Unfortunately it didn't work. When I typed in fuser -n tcp 80 I received the following error message from Konsole;

fuser: command not found.

I also tried this from root but I didn't get any message back from the command this time.

Thanks anyway. I'll keep on looking.

fuser command not found
 

Thanks for your help. Unfortunately it didn't work. When I typed in fuser -n tcp 80 I received the following error message from Konsole;

fuser: command not found.

I also tried this from root but I didn't get any message back from the command this time.

Thanks anyway. I'll keep on looking.

fuser should be run as root.
If you did not get anything back from the command,
then fuser could find any process ocupying port 80.

As another test try:
You should get a "connection refused"
If you can connect, and a cursor sits blinking and waiting in your terminal,
you might start to worry, because some proccess is running a listening socket on port 80, and root is not able to find out what PID it has.
(Might be a rootkit, worm or someting like that)

If you get a connection refused, "everything" is OK, and you should look further into the webserver config.

What webserver are you trying to use, what configuration ?