/etc/grep-dctrl.rc is in dctrl-tools 2.18ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | # Configuration for grep-dctrl. The config line format is
# line-oriented. Each line defines one executable name - default
# input file pair; the elements of the pair are in order and separated
# by whitespace. The hash '#' begins a comment that lasts to the end
# of line. Empty lines are ignored.
# There is some magic in the default input file name field.
# If it starts with
# @exec, the rest of the name is given to /bin/sh -c and its stdout is
# used as input, if no explicit file name is given on the command
# line
# A double @ at the start of the field denotes a single @ in the actual
# name.
# Template:
# <executable name> <default input file name>
# The following line used to be required, but it is now hardcoded.
# grep-dctrl -
# The following two pairs define common aliases for grep-dctrl.
grep-status /var/lib/dpkg/status
grep-available /var/lib/dpkg/available
# A new feature: grepping apt's available information
grep-aptavail @exec apt-cache dumpavail
# A new feature: grepping debtags' information
grep-debtags @exec debtags dumpavail
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