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Full Discussion: Sed, awk or another bash command to modify string with the content of another file
Top Forums UNIX for Beginners Questions & Answers Sed, awk or another bash command to modify string with the content of another file Post 303041972 by Neo on Tuesday 10th of December 2019 01:07:47 AM
Old 12-10-2019
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What is more important than "our ideas" is what is your idea and what code have you tried and what output and / or errors did you get?
 

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LEARN ABOUT DEBIAN

tinydyndns-update

tinydyndns-update(8)					      System Manager's Manual					      tinydyndns-update(8)

NAME

       tinydyndns-update - update TYPE A record in data.cdb

SYNOPSIS

       tinydyndns-update fqdn dynip

DESCRIPTION

       tinydyndns-update  changes  the data of a TYPE A record in data.cdb in the current directory.  Other than tinydns-data(8), tinydndns-update
       does not know about the source file data but changes the binary database data.cdb directly.

       First tinydyndns-update checks if the given fqdn has a TYPE A record in data.cdb.  Then it checks if the given IP address differs from  the
       one  in	the  TYPE  A record in data.cdb, or if the record's timestamp should be updated.  Finally if data.cdb needs to change, tinydyndns-
       update copies data.cdb to data.tmp, changes the IP address of the TYPE A record of fqdn to dynip in data.tmp, optionally  adjusts  time-to-
       live or time-to-die, and renames data.tmp to data.cdb.

ENVIRONMENT

       TTL    time-to-live.  The environment variable TTL overrides the default time-to-live in seconds (0 if TTD is set, otherwise 5).  If TTL is
	      not set or zero, the time-to-live of the record will not change.	$TTL must be an integer.

       TTD    time-to-die.  $TTD must be an integer, specifying a number of seconds.  If TTD is set, the timestamp of the record  is  set  to  the
	      current  time  plus  $TTD  seconds,  and TTL is set to zero by default, so that tinydns(8) interpretes the timestamp as time-to-die.
	      Note: you probably want to adjust SOA ttl, or create a wildcard record, to prevent DNS caches from caching nxdomain, when using this
	      feature.

       LOC    location.  $LOC must be two characters long.  If LOC is set, it specifies the client location for records to be updated.

EXIT CODES

       If tinydyndns-update cannot find a TYPE A record for fqdn in data.cdb, it prints a warning and exits 114.

       If  dynip  does not differ from the IP address of the TYPE A record of fqdn in data.cdb, and the environment variable TTD is not set, tiny-
       dyndns-update prints a note and exits 0.

       tinydyndns-update exits 100 if it has trouble opening data.cdb, and leaves data.cdb unchanged.

       tinydyndns-update exits 111 on temporary error, and leaves data.cdb unchanged.

       If data.cdb was changed successfully, tinydyndns-update exits 0.

FILES

	./data.cdb
	./data.tmp

SEE ALSO

       tinydyndns-data(8), tinydyndns-conf(8)

       http://smarden.org/tinydyndns/

AUTHOR

       Gerrit Pape <pape@smarden.org>

															      tinydyndns-update(8)
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