Looking for an awk command to print strings only if substring is missing

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LEARN ABOUT DEBIAN

rtcanrecv

RTCANRECV(1)							      Xenomai							      RTCANRECV(1)

NAME

       rtcanrecv - Xenomai tool for receiving CAN messages

SYNOPSIS

       rtcanrecv [<can-interface>] [Options]

DESCRIPTION

       rtcanrecv  is  part  of	Xenomai. It is used to receive messages via a CAN interface. The system must run a suitable Xenomai enabled kernel
       with the respective module (xeno_native and the CAN driver).

OPTIONS

       <can-interface> is the CAN interface file.

       rtcanrecv accepts the following options:

       -f, --filter=id:mask[:id:mask]...
	      apply filter

       -e, --error=mask
	      receive error messages

       -t, --timeout=MS
	      timeout in ms

       -T, --timestamp
	      with absolute timestamp

       -R, --timestamp-rel
	      with relative timestamp

       -v, --verbose
	      be verbose

       -p, --print=MODULO
	      print every MODULO message

       -h, --help
	      this help

SEE ALSO

       rtcanconfig(1), rtcanrecv(1)

AUTHORS

       rtcanrecv was written by Wolfgang Grandegger <wg@grandegger.com>, Jan Kiszka <jan.kiszka@web.de> and Philippe Gerum <rpm@xenomai.org>. This
       man page was written by Roland Stigge <stigge@antcom.de>.

2.6.0								    2008-04-19							      RTCANRECV(1)

Shell Programming and Scripting