explanation for "if [ -s $filename ];" Post: 302151245

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named-checkzone

named-checkzone(1)					      General Commands Manual						named-checkzone(1)

NAME

       named-checkzone - zone validity checking tool

SYNOPSIS

       class] mode] mode] outfile] directory] directory] zonename [filename]

DESCRIPTION

       is a tool for performing integrity checks on the zone contents.	It uses the same integrity checks as the daemon when loading a zone.  This
       makes useful for checking zone files before configuring them into a name server.  Zones and zone files are described in named.conf(4).

   Options
       Specify the class of the zone.

       Dump the zone file in canonical format.

       Enable debugging.

       Read the journal (if it exists) when loading the zone file.

       Perform	 checks with the specified failure mode.  Possible modes are (default), and The option is described in named.conf(4).

       Specify whether NS records should be checked to see if they are addresses.
		 Possible modes are (default), and

       Write zone output to
		 outfile .

       Enable quiet mode for exit code only.

       Print the version of
		 and exit.

       Change to directory (see chdir(2)) so that relative file names in master file directives work This is similar to the clause in

   Operands
       filename  The file to use for checking the zone contents.  The default is the file with the zone name.  For the default to work,  the  file
		 name for the zone in the statement of the file must be identical to the zone name.

       zonename  The zone whose contents are to be checked.

RETURN VALUE

       sets the exit status to:

	      Success.

	      Errors were detected.

EXAMPLES

       To perform integrity checks on zone in the zone file and display debug information:

AUTHOR

       was developed by the Internet Systems Consortium (ISC).

SEE ALSO

       named(1M), chdir(2), named.conf(4).

       Requests for Comments (RFC): 1035, available online at

       available online at

       available from the Internet Systems Consortium at

								     BIND 9.3							named-checkzone(1)