how to know whether particular port number is free or not

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# 1  
Old 10-10-2002
Data how to know whether particular port number is free or not

I wish to know whether a particular port is free or not in my SUN solaris SPARC machine . I wish to use that particular port for one server software.

How do I know that.
# 2  
Old 10-10-2002
In my AIX machine i do the following to determine

telnet <machine_name> <port-number>

When you say telnet <machine-IP> it connects to default 80

when you say telnet <machine_IP> 5000

If port 5000 is used by any other process telnet connects

otherwise it gives error message

remote machine refused connection

This happens in our AIX machines ,Check with your local expert

# 3  
Old 10-10-2002
you can also use the netstat command.

issued netstat -an | grep (port) | grep -i listen

if the port is listen then the port is not yet disable.
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