Who's using port 80 ?

[Preet Dhillon]

Dear Colleagues,

I'd like to know which processes (if any) are using port 80 on my HP-UX 11.00 server. I'm trying to start an Oracle service on this port and it's failing so I'd like to know if something else is already using port 80. Is there a way of telling ?

Many thanks and regards,
Preet

[Robert Gamble]

port 80 is the default port for web servers.
see /etc/services for variations.

More than likely someone is running a webserver on this server.

[Domenico_5]

hi


use:

grep 80 /etc/services

it's http server

[melvyn burnard]

standard port for http
check /etc/services

[Steven Gillard_2 · Accepted solution]

You can use the 'lsof' utility to find out the actual process thats using a port. Get it from:

http://hpux.connect.org.uk/hppd/hpux/Sysadmin/lsof-4.61/

Regards,
Steve

[Preet Dhillon]

Hi Steven ,

Many thanks for the link to lsof which I've downloaded and installed. The install of lsof includes a file called /otp/lsof/man/man8/lsof.8. Can you advise how to read this as a man page ?

Many thanks and regards,
Preet

[Steven Gillard_2]

Just add it to your MANPATH:

# export MANPATH=$MANPATH:/opt/lsof/man
# man lsof

You should be able to get the information you want by running the following lsof command:

# lsof -i -n | grep 80 | grep LISTEN

Regards,
Steve

[MANOJ SRIVASTAVA]

Hi Preet

You can mv the man file under /usr/share/man/man.8/lsof.8 and the do a man lsof as this directory is the default man path. or you can do a man lsof under the sam directory to read it .


And for port 80 do a lsof | grep 80 to know who is using it.


Manoj Srivastava

[harry d brown jr]

export MANPATH=$MANPATH:/opt/lsof/man

man lsof


You probably want to add it to your profile.


live free or die
harry

[pap]

Hi,
Port 80 is by deault to be used by web services.

thanks,
-pap

[John Bolene]

Back on the path to man pages.

Make that page permanent for all users by adding the path to /etc/MANPATH

Another aside... If your ISP provider has banned use of a webserver on port 80 and blocked those packets, just switch it to another port such as 81. You will have to provide your users with the port number, since 80 is the assumed default.

[hpuxrox]

Been here before my friend, The best way to find out it to install lsof. If your companys policy doesnt alow you. You can try netstat -a and grep for port 80 to give you a clue.