hxmuller/determine which Debian package provides an executable binary

## determine which Debian package provides an executable binary
# This does not work for packages not installed. '$(which COMMAND)'
# may be replaced with any /path/file. Replace COMMAND with binary
# of interest.
#
# dpkg - package manager for Debian
#   -S Search for a filename from installed packages
# which - locate a command
# awk - process output of previous command
#   gsub(r,s,[t]) - global subsitution, every match of regular expression
#     r in variable t is replaced by string s. If t is omitted, $0 is used.
#     /:$/ - matches a colon ':' at the end of a string
#     "" - empty string
#     $1 - first field
#   print $1 - writes field 1 to stdout
#
# sort - sort lines of text files
#   -u (without -c) output only the first of an equal run

dpkg -S $(which COMMAND) | awk '{gsub(/:$/,"",$1); print $1}' | sort -u
	# This does not work for packages not installed. '$(which COMMAND)'
	# may be replaced with any /path/file. Replace COMMAND with binary
	# of interest.
	#
	# dpkg - package manager for Debian
	# -S Search for a filename from installed packages
	# which - locate a command
	# awk - process output of previous command
	# gsub(r,s,[t]) - global subsitution, every match of regular expression
	# r in variable t is replaced by string s. If t is omitted, $0 is used.
	# /:$/ - matches a colon ':' at the end of a string
	# "" - empty string
	# $1 - first field
	# print $1 - writes field 1 to stdout
	#
	# sort - sort lines of text files
	# -u (without -c) output only the first of an equal run

	dpkg -S $(which COMMAND) \| awk '{gsub(/:$/,"",$1); print $1}' \| sort -u