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Script to check if Port is Active

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Old 08-10-2010
Script to check if Port is Active
is there a better way to check if a port is active on linux and sunos systems?

this is currently what I'm using in my script:

Code:
netstat -an | egrep -i "$PORT"


i know this isn't the best way as there could be numbers in that output that has my port number in it but isn't necessarily a port.
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LEARN ABOUT DEBIAN

ibcheckportwidth

IBCHECKPORTWIDTH(8)						OpenIB Diagnostics					       IBCHECKPORTWIDTH(8)

NAME

       ibcheckportwidth - validate IB port for 1x link width

SYNOPSIS

       ibcheckport [-h] [-v] [-N | -nocolor] [-G] [-C ca_name] [-P ca_port] [-t(imeout) timeout_ms]  <lid|guid> <port>

DESCRIPTION

       Check  connectivity  and  check	the  specified	port  for 1x link width.  Port address is a lid unless -G option is used to specify a GUID
       address.

OPTIONS

       -G      use GUID address argument. In most cases, it is the Port GUID.
	       Example:
	       "0x08f1040023"

       -v      increase the verbosity level

       -N | -nocolor use mono rather than color mode

       -C <ca_name>    use the specified ca_name.

       -P <ca_port>    use the specified ca_port.

       -t <timeout_ms> override the default timeout for the solicited mads.

EXAMPLE

       ibcheckportwidth 2 3	    # check lid 2 port 3

SEE ALSO

       smpquery(8), ibaddr(8)

AUTHOR

       Hal Rosenstock
	      <halr@voltaire.com>

OpenIB								   May 21, 2007 					       IBCHECKPORTWIDTH(8)