This file is indexed.

/etc/astconvolve.conf is in gnuastro 0.5-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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# Default parameters (System) for Convolve.
# Convolve is part of GNU Astronomy Utitlies.
#
# Use the long option name of each parameter followed by a value. The name
# and value should be separated by atleast one white-space character (for
# example ` '[space], or tab). Lines starting with `#' are ignored.
#
# For more information, please run these commands:
#
#  $ astconvolve --help                  # Full list of options, short doc.
#  $ astconvolve -P                      # Print all options and used values.
#  $ info astconvolve                    # All options and input/output.
#  $ info gnuastro "Configuration files" # How to use configuration files.
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice and
# this notice are preserved.  This file is offered as-is, without any
# warranty.

# Input:
 kernel             kernel.fits
 khdu               1

# Output:
 type               float32

# Operating mode:
 domain             frequency
 minsharpspec       0.005