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Full Discussion: Need a Bash script for iterating thru an array and running a command
Top Forums UNIX for Beginners Questions & Answers Need a Bash script for iterating thru an array and running a command Post 303026987 by apmcd47 on Thursday 6th of December 2018 12:32:41 PM
Old 12-06-2018
Off topic, but may be pertinent to @SVRao19056.

As you are using docker, you probably already know that the output of some commands can be formatted with GO Templates:
Code:
docker images --format '{{json .}}'
docker images --format '{{json .Tag}}'

The examples above use the GO template to format in JSON format. I strongly recommend that you install the command line utility jq to use with this output. Not only does it allow for readable formatting of the JSON, but it allows for drilling down into the data more easily than just reading the output. For example, the keywords of the output of docker images:
Code:
docker images --format '{{json .}}' | head -1 | jq '.|keys'

Find the keys in the IPAM component of a network:
Code:
docker network inspect --format '{{json .IPAM}}' cf06ecfeb5f0 | jq '.|keys'

You can only access one component in docker so you have to use jq:

Code:
docker network inspect --format '{{json .IPAM}}' cf06ecfeb5f0 | jq '.Config,.Driver'
docker network inspect --format '{{json .}}' cf06ecfeb5f0 | jq '.IPAM|.Config,.Driver'

and so on.

Andrew
 

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LEARN ABOUT DEBIAN

json_xs

JSON_XS(1p)						User Contributed Perl Documentation					       JSON_XS(1p)

NAME

       json_xs - JSON::XS commandline utility

SYNOPSIS

	  json_xs [-v] [-f inputformat] [-t outputformat]

DESCRIPTION

       json_xs converts between some input and output formats (one of them is JSON).

       The default input format is "json" and the default output format is "json-pretty".

OPTIONS

       -v  Be slightly more verbose.

       -f fromformat
	   Read a file in the given format from STDIN.

	   "fromformat" can be one of:

	   json - a json text encoded, either utf-8, utf16-be/le, utf32-be/le
	   storable - a Storable frozen value
	   storable-file - a Storable file (Storable has two incompatible formats)
	   clzf - Compress::LZF format (requires that module to be installed)
	   yaml - YAML (avoid at all costs, requires the YAML module :)
	   eval - evaluate the given code as (non-utf-8) Perl, basically the reverse of "-t dump"
       -t toformat
	   Write the file in the given format to STDOUT.

	   "toformat" can be one of:

	   json, json-utf-8 - json, utf-8 encoded
	   json-pretty - as above, but pretty-printed
	   json-utf-16le, json-utf-16be - little endian/big endian utf-16
	   json-utf-32le, json-utf-32be - little endian/big endian utf-32
	   storable - a Storable frozen value in network format
	   storable-file - a Storable file in network format (Storable has two incompatible formats)
	   clzf - Compress::LZF format
	   yaml - YAML
	   dump - Data::Dump
	   dumper - Data::Dumper
	       Note that Data::Dumper doesn't handle self-referential data structures correctly - use "dump" instead.

EXAMPLES

	  json_xs -t null <isitreally.json

       "JSON Lint" - tries to parse the file isitreally.json as JSON - if it is valid JSON, the command outputs nothing, otherwise it will print
       an error message and exit with non-zero exit status.

	  <src.json json_xs >pretty.json

       Prettify the JSON file src.json to dst.json.

	  json_xs -f storable-file <file

       Read the serialised Storable file file and print a human-readable JSON version of it to STDOUT.

	  json_xs -f storable-file -t yaml <file

       Same as above, but write YAML instead (not using JSON at all :)

	  lwp-request http://cpantesters.perl.org/show/JSON-XS.json | json_xs

       Fetch the cpan-testers result summary "JSON::XS" and pretty-print it.

AUTHOR

       Copyright (C) 2008 Marc Lehmann <json@schmorp.de>

perl v5.14.2							    2010-08-17							       JSON_XS(1p)
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