03-04-2016
I guess but may be terribly wrong that system doesn't return the command's stdout but an exit code. On top, the awk you supplied is wrong in (at least) two ways: it needs its data supplied in files, e.g. stdin, not a variable, and the field count doesn't fit. 3206000 is field 6.
Why is it you can't extract that value in perl ?
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LEARN ABOUT CENTOS
amarchiver
AMARCHIVER(8) System Administration Commands AMARCHIVER(8)
NAME
amarchiver - Create, extract or list amanda archive
SYNOPSIS
amarchiver --version|--create|--extract|--list [--verbose] [--file file] [filename]...
DESCRIPTION
Amarchiver manipulates amanda archive file. On creation, amarchiver doesn't recurse into directories. If a filename specifies a directory,
it will be ignored. If it specifies a character device, amarchiver reads the device and archives the data. If a filename specifies a named
pipe, amarchiver reads the named pipe and archives the data.
Note that this tool is more limited than the Amanda archive library, and may not be appropriate for some archive files -- particularly
those which use non-strings in their filenames.
OPTIONS
--version
print the amarchiver version
--create
Create an amanda archive. Only the supplied filenames are included. With one --verbose, lists the filenames. With two, lists the
filenames and sizes.
--list
List the filenames in an amanda archive. No additional filenames are allowed on the command line.
--extract
Extract an amanda archive. If filenames are supplied, only those files are extracted. Files are created in the current directory,
suffixed with a dot ('.') and the attribute ID.
--verbose
Give more information.
--file file
Create, list or extract from the given file instead of stdin/stdout.
SEE ALSO
amanda(8), amanda-archive-format(5)
The Amanda Wiki: : http://wiki.zmanda.com/
AUTHORS
Dustin J. Mitchell <dustin@zmanda.com>
Zmanda, Inc. (http://www.zmanda.com)
Jean-Louis Martineau <martineau@zmanda.com>
Zmanda, Inc. (http://www.zmanda.com)
Amanda 3.3.3 01/10/2013 AMARCHIVER(8)