jc 1.25.3

Converts the output of popular command-line tools and file-types to JSON.

Check out the jc Python package documentation for developers

Try the jc web demo and REST API

jc is available as an Ansible filter plugin in the community.general collection. See this blog post for an example.

JC

JSON Convert

jc JSONifies the output of many CLI tools, file-types, and common strings for easier parsing in scripts. See the Parsers section for supported commands, file-types, and strings.

dig example.com | jc --dig

[{"id":38052,"opcode":"QUERY","status":"NOERROR","flags":["qr","rd","ra"],
"query_num":1,"answer_num":1,"authority_num":0,"additional_num":1,
"opt_pseudosection":{"edns":{"version":0,"flags":[],"udp":4096}},"question":
{"name":"example.com.","class":"IN","type":"A"},"answer":[{"name":
"example.com.","class":"IN","type":"A","ttl":39049,"data":"93.184.216.34"}],
"query_time":49,"server":"2600:1700:bab0:d40::1#53(2600:1700:bab0:d40::1)",
"when":"Fri Apr 16 16:09:00 PDT 2021","rcvd":56,"when_epoch":1618614540,
"when_epoch_utc":null}]

This allows further command-line processing of output with tools like jq or jello by piping commands:

$ dig example.com | jc --dig | jq -r '.[].answer[].data'
93.184.216.34

or using the alternative "magic" syntax:

$ jc dig example.com | jq -r '.[].answer[].data'
93.184.216.34

jc can also be used as a python library. In this case the returned value will be a python dictionary, a list of dictionaries, or even a lazy iterable of dictionaries instead of JSON:

>>> import subprocess
>>> import jc
>>>
>>> cmd_output = subprocess.check_output(['dig', 'example.com'], text=True)
>>> data = jc.parse('dig', cmd_output)
>>>
>>> data[0]['answer']
[{'name': 'example.com.', 'class': 'IN', 'type': 'A', 'ttl': 29658, 'data':
'93.184.216.34'}]

For jc Python package documentation, use help('jc'), help('jc.lib'), or see the online documentation.

Two representations of the data are available. The default representation uses a strict schema per parser and converts known numbers to int/float JSON values. Certain known values of None are converted to JSON null, known boolean values are converted, and, in some cases, additional semantic context fields are added.

To access the raw, pre-processed JSON, use the -r cli option or the raw=True function parameter in parse() when using jc as a python library.

Schemas for each parser can be found at the documentation link beside each Parser below.

Release notes can be found in the Releases section on Github.

Why Would Anyone Do This!?

For more information on the motivations for this project, please see my blog post on Bringing the Unix Philosophy to the 21st Century and my interview with Console.

See also:

• libxo on FreeBSD
• powershell
• blog: linux apps should have a json flag
• Hacker News discussion
• Reddit discussion

Use Cases:

• Bash scripting
• Ansible command output parsing
• Saltstack command output parsing
• Nornir command output parsing
• FortiSOAR command output parsing

Installation

There are several ways to get jc. You can install via pip, OS package repositories, or by downloading the correct binary for your architecture and running it anywhere on your filesystem.

Pip (macOS, linux, unix, Windows)

pip3 install jc

OS Package Repositories

OS	Command
Debian/Ubuntu linux	apt-get install jc
Fedora linux	dnf install jc
openSUSE linux	zypper install jc
Arch linux	pacman -S jc
NixOS linux	nix-env -iA nixpkgs.jc or nix-env -iA nixos.jc
Guix System linux	guix install jc
Gentoo Linux	emerge dev-python/jc
Photon linux	tdnf install jc
macOS	brew install jc
FreeBSD	portsnap fetch update && cd /usr/ports/textproc/py-jc && make install clean
Ansible filter plugin	ansible-galaxy collection install community.general
FortiSOAR connector	Install from FortiSOAR Connector Marketplace

For more OS Packages, see https://repology.org/project/jc/versions.

Binaries

For precompiled binaries, see Releases on Github.

Usage

jc accepts piped input from STDIN and outputs a JSON representation of the previous command's output to STDOUT.

COMMAND | jc [SLICE] [OPTIONS] PARSER
cat FILE | jc [SLICE] [OPTIONS] PARSER
echo STRING | jc [SLICE] [OPTIONS] PARSER

Alternatively, the "magic" syntax can be used by prepending jc to the command to be converted or in front of the absolute path for Proc files. Options can be passed to jc immediately before the command or Proc file path is given. (Note: command aliases and shell builtins are not supported)

jc [SLICE] [OPTIONS] COMMAND
jc [SLICE] [OPTIONS] /proc/<path-to-procfile>

The JSON output can be compact (default) or pretty formatted with the -p option.

Parsers

Argument	Command or Filetype	Documentation
--acpi	acpi command parser	details
--airport	airport -I command parser	details
--airport-s	airport -s command parser	details
--apt-cache-show	apt-cache show command parser	details
--apt-get-sqq	apt-get -sqq command parser	details
--arp	arp command parser	details
--asciitable	ASCII and Unicode table parser	details
--asciitable-m	multi-line ASCII and Unicode table parser	details
--blkid	blkid command parser	details
--bluetoothctl	bluetoothctl command parser	details
--cbt	cbt (Google Bigtable) command parser	details
--cef	CEF string parser	details
--cef-s	CEF string streaming parser	details
--certbot	certbot command parser	details
--chage	chage --list command parser	details
--cksum	cksum and sum command parser	details
--clf	Common and Combined Log Format file parser	details
--clf-s	Common and Combined Log Format file streaming parser	details
--crontab	crontab command and file parser	details
--crontab-u	crontab file parser with user support	details
--csv	CSV file parser	details
--csv-s	CSV file streaming parser	details
--curl-head	curl --head command parser	details
--date	date command parser	details
--datetime-iso	ISO 8601 Datetime string parser	details
--debconf-show	debconf-show command parser	details
--df	df command parser	details
--dig	dig command parser	details
--dir	dir command parser	details
--dmidecode	dmidecode command parser	details
--dpkg-l	dpkg -l command parser	details
--du	du command parser	details
--efibootmgr	efibootmgr command parser	details
--email-address	Email Address string parser	details
--env	env command parser	details
--ethtool	ethtool command parser	details
--file	file command parser	details
--find	find command parser	details
--findmnt	findmnt command parser	details
--finger	finger command parser	details
--free	free command parser	details
--fstab	/etc/fstab file parser	details
--git-log	git log command parser	details
--git-log-s	git log command streaming parser	details
--git-ls-remote	git ls-remote command parser	details
--gpg	gpg --with-colons command parser	details
--group	/etc/group file parser	details
--gshadow	/etc/gshadow file parser	details
--hash	hash command parser	details
--hashsum	hashsum command parser (md5sum, shasum, etc.)	details
--hciconfig	hciconfig command parser	details
--history	history command parser	details
--host	host command parser	details
--hosts	/etc/hosts file parser	details
--http-headers	HTTP headers parser	details
--id	id command parser	details
--ifconfig	ifconfig command parser	details
--ini	INI file parser	details
--ini-dup	INI with duplicate key file parser	details
--iostat	iostat command parser	details
--iostat-s	iostat command streaming parser	details
--ip-address	IPv4 and IPv6 Address string parser	details
--iptables	iptables command parser	details
--ip-route	ip route command parser	details
--iw-scan	iw dev [device] scan command parser	details
--iwconfig	iwconfig command parser	details
--jar-manifest	Java MANIFEST.MF file parser	details
--jobs	jobs command parser	details
--jwt	JWT string parser	details
--kv	Key/Value file and string parser	details
--kv-dup	Key/Value with duplicate key file and string parser	details
--last	last and lastb command parser	details
--ls	ls command parser	details
--ls-s	ls command streaming parser	details
--lsattr	lsattr command parser	details
--lsb-release	lsb_release command parser	details
--lsblk	lsblk command parser	details
--lsmod	lsmod command parser	details
--lsof	lsof command parser	details
--lspci	lspci -mmv command parser	details
--lsusb	lsusb command parser	details
--m3u	M3U and M3U8 file parser	details
--mdadm	mdadm command parser	details
--mount	mount command parser	details
--mpstat	mpstat command parser	details
--mpstat-s	mpstat command streaming parser	details
--needrestart	needrestart -b command parser	details
--netstat	netstat command parser	details
--nmcli	nmcli command parser	details
--nsd-control	nsd-control command parser	details
--ntpq	ntpq -p command parser	details
--openvpn	openvpn-status.log file parser	details
--os-prober	os-prober command parser	details
--os-release	/etc/os-release file parser	details
--passwd	/etc/passwd file parser	details
--path	POSIX path string parser	details
--path-list	POSIX path list string parser	details
--pci-ids	pci.ids file parser	details
--pgpass	PostgreSQL password file parser	details
--pidstat	pidstat -H command parser	details
--pidstat-s	pidstat -H command streaming parser	details
--ping	ping and ping6 command parser	details
--ping-s	ping and ping6 command streaming parser	details
--pip-list	pip list command parser	details
--pip-show	pip show command parser	details
--pkg-index-apk	Alpine Linux Package Index file parser	details
--pkg-index-deb	Debian Package Index file parser	details
--plist	PLIST file parser	details
--postconf	postconf -M command parser	details
--proc	/proc/ file parser	details
--ps	ps command parser	details
--resolve-conf	/etc/resolve.conf file parser	details
--route	route command parser	details
--rpm-qi	rpm -qi command parser	details
--rsync	rsync command parser	details
--rsync-s	rsync command streaming parser	details
--semver	Semantic Version string parser	details
--sfdisk	sfdisk command parser	details
--shadow	/etc/shadow file parser	details
--srt	SRT file parser	details
--ss	ss command parser	details
--ssh-conf	ssh config file and ssh -G command parser	details
--sshd-conf	sshd config file and sshd -T command parser	details
--stat	stat command parser	details
--stat-s	stat command streaming parser	details
--swapon	swapon command parser	details
--sysctl	sysctl command parser	details
--syslog	Syslog RFC 5424 string parser	details
--syslog-s	Syslog RFC 5424 string streaming parser	details
--syslog-bsd	Syslog RFC 3164 string parser	details
--syslog-bsd-s	Syslog RFC 3164 string streaming parser	details
--systemctl	systemctl command parser	details
--systemctl-lj	systemctl list-jobs command parser	details
--systemctl-ls	systemctl list-sockets command parser	details
--systemctl-luf	systemctl list-unit-files command parser	details
--systeminfo	systeminfo command parser	details
--time	/usr/bin/time command parser	details
--timedatectl	timedatectl status command parser	details
--timestamp	Unix Epoch Timestamp string parser	details
--toml	TOML file parser	details
--top	top -b command parser	details
--top-s	top -b command streaming parser	details
--tracepath	tracepath and tracepath6 command parser	details
--traceroute	traceroute and traceroute6 command parser	details
--tune2fs	tune2fs -l command parser	details
--udevadm	udevadm info command parser	details
--ufw	ufw status command parser	details
--ufw-appinfo	ufw app info [application] command parser	details
--uname	uname -a command parser	details
--update-alt-gs	update-alternatives --get-selections command parser	details
--update-alt-q	update-alternatives --query command parser	details
--upower	upower command parser	details
--uptime	uptime command parser	details
--url	URL string parser	details
--ver	Version string parser	details
--veracrypt	veracrypt command parser	details
--vmstat	vmstat command parser	details
--vmstat-s	vmstat command streaming parser	details
--w	w command parser	details
--wc	wc command parser	details
--who	who command parser	details
--x509-cert	X.509 PEM and DER certificate file parser	details
--x509-csr	X.509 PEM and DER certificate request file parser	details
--xml	XML file parser	details
--xrandr	xrandr command parser	details
--yaml	YAML file parser	details
--zipinfo	zipinfo command parser	details
--zpool-iostat	zpool iostat command parser	details
--zpool-status	zpool status command parser	details

Options

Short	Long	Description
-a	--about	About jc. Prints information about jc and the parsers (in JSON or YAML, of course!)
-C	--force-color	Force color output even when using pipes (overrides -m and the NO_COLOR env variable)
-d	--debug	Debug mode. Prints trace messages if parsing issues are encountered (use-dd for verbose debugging)
-h	--help	Help. Use jc -h --parser_name for parser documentation. Use twice to show hidden parsers (e.g. -hh). Use thrice to show parser categories (e.g. -hhh).
-m	--monochrome	Monochrome output
-M	--meta-out	Add metadata to output including timestamp, parser name, magic command, magic command exit code, etc.
-p	--pretty	Pretty format the JSON output
-q	--quiet	Quiet mode. Suppresses parser warning messages (use -qq to ignore streaming parser errors)
-r	--raw	Raw output. Provides more literal output, typically with string values and no additional semantic processing
-s	--slurp	Slurp multiple lines into an array. (use -hhh to find compatible parsers)
-u	--unbuffer	Unbuffer output
-v	--version	Version information
-y	--yaml-out	YAML output
-B	--bash-comp	Generate Bash shell completion script (more info)
-Z	--zsh-comp	Generate Zsh shell completion script (more info)

Slice

Line slicing is supported using the START:STOP syntax similar to Python slicing. This allows you to skip lines at the beginning and/or end of the STDIN input you would like jc to convert.

START and STOP can be positive or negative integers or blank and allow you to specify how many lines to skip and how many lines to process. Positive and blank slices are the most memory efficient. Any negative integers in the slice will use more memory.

For example, to skip the first and last line of the following text, you could express the slice in a couple ways:

$ cat table.txt
      ### We want to skip this header ###
          col1       col2
          foo        1
          bar        2
      ### We want to skip this footer ###
$ cat table.txt | jc 1:-1 --asciitable
[{"col1":"foo","col2":"1"},{"col1":"bar","col2":"2"}]
$ cat table.txt | jc 1:4 --asciitable
[{"col1":"foo","col2":"1"},{"col1":"bar","col2":"2"}]

In this example 1:-1 and 1:4 line slices provide the same output.

When using positive integers the index location of STOP is non-inclusive. Positive slices count from the first line of the input toward the end starting at 0 as the first line. Negative slices count from the last line toward the beginning starting at -1 as the last line. This is also the way Python's slicing feature works.

Here is a breakdown of line slice options:

Slice Notation	Input Lines Processed
START:STOP	lines START through STOP - 1
START:	lines START through the rest of the output
:STOP	lines from the beginning through STOP - 1
-START:STOP	START lines from the end through STOP - 1
START:-STOP	lines START through STOP lines from the end
-START:-STOP	START lines from the end through STOP lines from the end
-START:	START lines from the end through the rest of the output
:-STOP	lines from the beginning through STOP lines from the end
:	all lines

Slurp

Some parsers support multi-item input and can output an array of results in a single pass. Slurping works for string parsers that accept a single line of input. (e.g. url and ip-address) To see a list of parsers that support the --slurp option, use jc -hhh.

For example, you can send a file with multiple IP addresses (one per line) to jc with the --slurp option and an array of results will output:

$ cat ip-addresses.txt | jc --slurp --ip-address
[<multiple output objects>]

The magic syntax for /proc files automatically supports slurping of multiple files (no need to use the --slurp option). For example, you can convert many PID files at once:

$ jc /proc/*/status
[<multiple output objects>]

When the /proc magic syntax is used and multiple files are selected, an additional _file field is inserted in the output so it is easier to tell what file each output object refers to.

Finally, the --meta-out option can be used in conjunction with slurped output. In this case, the slurped output is wrapped in an object with the following structure:

{
  "result": [<multiple output objects>],
  "_jc_meta": {
    "parser": "url",
    "timestamp": 1706235558.654576,
    "slice_start": null,
    "slice_end": null,
    "input_list": [
      "http://www.google.com",
      "https://www.apple.com",
      "https://www.microsoft.com"
    ]
  }
}

With --meta-out, input_list contains a list of inputs (actual input strings or /proc filenames) so you can identify which output object relates to each input string or /proc filename.

Exit Codes

Any fatal errors within jc will generate an exit code of 100, otherwise the exit code will be 0.

When using the "magic" syntax (e.g. jc ifconfig eth0), jc will store the exit code of the program being parsed and add it to the jc exit code. This way it is easier to determine if an error was from the parsed program or jc.

Consider the following examples using ifconfig:

ifconfig exit code	jc exit code	Combined exit code	Interpretation
0	0	0	No errors
1	0	1	Error in ifconfig
0	100	100	Error in jc
1	100	101	Error in both ifconfig and jc

When using the "magic" syntax you can also retrieve the exit code of the called program by using the --meta-out or -M option. This will append a _jc_meta object to the output that will include the magic command information, including the exit code.

Here is an example with ping:

$ jc --meta-out -p ping -c2 192.168.1.252
{
  "destination_ip": "192.168.1.252",
  "data_bytes": 56,
  "pattern": null,
  "destination": "192.168.1.252",
  "packets_transmitted": 2,
  "packets_received": 0,
  "packet_loss_percent": 100.0,
  "duplicates": 0,
  "responses": [
    {
      "type": "timeout",
      "icmp_seq": 0,
      "duplicate": false
    }
  ],
  "_jc_meta": {
    "parser": "ping",
    "timestamp": 1661357115.27949,
    "magic_command": [
      "ping",
      "-c2",
      "192.168.1.252"
    ],
    "magic_command_exit": 2
  }
}
$ echo $?
2

Setting Custom Colors via Environment Variable

You can specify custom colors via the JC_COLORS environment variable. The JC_COLORS environment variable takes four comma separated string values in the following format:

JC_COLORS=<keyname_color>,<keyword_color>,<number_color>,<string_color>

Where colors are: black, red, green, yellow, blue, magenta, cyan, gray, brightblack, brightred, brightgreen, brightyellow, brightblue, brightmagenta, brightcyan, white, or default

For example, to set to the default colors:

JC_COLORS=blue,brightblack,magenta,green

or

JC_COLORS=default,default,default,default

Disable Colors via Environment Variable

You can set the NO_COLOR environment variable to any value to disable color output in jc. Note that using the -C option to force color output will override both the NO_COLOR environment variable and the -m option.

Streaming Parsers

Most parsers load all of the data from STDIN, parse it, then output the entire JSON document serially. There are some streaming parsers (e.g. ls-s and ping-s) that immediately start processing and outputting the data line-by-line as JSON Lines (aka NDJSON) while it is being received from STDIN. This can significantly reduce the amount of memory required to parse large amounts of command output (e.g. ls -lR /) and can sometimes process the data more quickly. Streaming parsers have slightly different behavior than standard parsers as outlined below.

Note: Streaming parsers cannot be used with the "magic" syntax

Ignoring Errors

You may want to ignore parsing errors when using streaming parsers since these may be used in long-lived processing pipelines and errors can break the pipe. To ignore parsing errors, use the -qq cli option or the ignore_exceptions=True argument with the parse() function. This will add a _jc_meta object to the JSON output with a success attribute. If success is true, then there were no issues parsing the line. If success is false, then a parsing issue was found and error and line fields will be added to include a short error description and the contents of the unparsable line, respectively:

Successfully parsed line with -qq option:

{
  "command_data": "data",
  "_jc_meta": {
    "success": true
  }
}

Unsuccessfully parsed line with -qq option:

{
  "_jc_meta": {
    "success": false,
    "error": "error message",
    "line": "original line data"
  }
}

Unbuffering Output

Most operating systems will buffer output that is being piped from process to process. The buffer is usually around 4KB. When viewing the output in the terminal the OS buffer is not engaged so output is immediately displayed on the screen. When piping multiple processes together, though, it may seem as if the output is hanging when the input data is very slow (e.g. ping):

$ ping 1.1.1.1 | jc --ping-s | jq
<slow output>

This is because the OS engages the 4KB buffer between jc and jq in this example. To display the data on the terminal in realtime, you can disable the buffer with the -u (unbuffer) cli option:

$ ping 1.1.1.1 | jc --ping-s -u | jq
{"type":"reply","pattern":null,"timestamp":null,"bytes":"64","respons...}
{"type":"reply","pattern":null,"timestamp":null,"bytes":"64","respons...}
...

Note: Unbuffered output can be slower for large data streams.

Using Streaming Parsers as Python Modules

Streaming parsers accept any iterable object and return an iterable object allowing lazy processing of the data. The input data should iterate on lines of string data. Examples of good input data are sys.stdin or str.splitlines().

To use the returned iterable object in your code, simply loop through it or use the next() builtin function:

import jc

result = jc.parse('ls_s', ls_command_output.splitlines())
for item in result:
    print(item["filename"])

Parser Plugins

Parser plugins may be placed in a jc/jcparsers folder in your local "App data directory":

• Linux/unix: $HOME/.local/share/jc/jcparsers
• macOS: $HOME/Library/Application Support/jc/jcparsers
• Windows: $LOCALAPPDATA\jc\jc\jcparsers

Parser plugins are standard python module files. Use the jc/parsers/foo.py or jc/parsers/foo_s.py (streaming) parser as a template and simply place a .py file in the jcparsers subfolder. Any dependencies can be placed in the jc folder above jcparsers and can be imported in the parser code.

Parser plugin filenames must be valid python module names and therefore must start with a letter and consist entirely of alphanumerics and underscores. Local plugins may override default parsers.

Note: The application data directory follows the XDG Base Directory Specification

Caveats

Locale

For best results set the locale environment variables to C or en_US.UTF-8 by modifying the LC_ALL variable:

$ LC_ALL=C date | jc --date

You can also set the locale variables individually:

$ export LANG=C
$ export LC_NUMERIC=C

On some older systems UTF-8 output will be downgraded to ASCII with \\u escape sequences if the C locale does not support UTF-8 encoding.

Timezones

Some parsers have calculated epoch timestamp fields added to the output. Unless a timestamp field name has a _utc suffix it is considered naive. (i.e. based on the local timezone of the system the jc parser was run on).

If a UTC timezone can be detected in the text of the command output, the timestamp will be timezone aware and have a _utc suffix on the key name. (e.g. epoch_utc) No other timezones are supported for aware timestamps.

Use In Other Shells

jc can be used in most any shell. Some modern shells have JSON deserialization and filtering capabilities built-in which makes using jc even more convenient.

For example, the following is possible in NGS (Next Generation Shell):

myvar = ``jc dig www.google.com``[0].answer[0].data

This runs jc, parses the output JSON, and assigs the resulting data structure to a variable in a single line of code.

For more examples of how to use jc in other shells, see this wiki page.

Compatibility

Some parsers like dig, xml, csv, etc. will work on any platform. Other parsers that convert platform-specific output will generate a warning message if they are run on an unsupported platform. To see all parser information, including compatibility, run jc -ap.

You may still use a parser on an unsupported platform - for example, you may want to parse a file with linux lsof output on a macOS or Windows laptop. In that case you can suppress the warning message with the -q cli option or the quiet=True function parameter in parse():

macOS:

cat lsof.out | jc -q --lsof

or Windows:

type lsof.out | jc -q --lsof

Tested on:

• Centos 7.7
• Ubuntu 18.04
• Ubuntu 20.04
• Fedora32
• macOS 10.11.6
• macOS 10.14.6
• NixOS
• FreeBSD12
• Windows 10
• Windows 2016 Server
• Windows 2019 Server

Contributions

Feel free to add/improve code or parsers! You can use the jc/parsers/foo.py or jc/parsers/foo_s.py (streaming) parsers as a template and submit your parser with a pull request.

Please see the Contributing Guidelines for more information.

Acknowledgments

• Local parser plugin feature contributed by Dean Serenevy
• CI automation and code optimizations by philippeitis
• ifconfig-parser module by KnightWhoSayNi
• xmltodict module by Martín Blech
• ruamel.yaml module by Anthon van der Neut
• trparse module by Luis Benitez
• Parsing code from Conor Heine adapted for some parsers
• Excellent constructive feedback from Ilya Sher

Examples

Here are some examples of jc output. For more examples, see here or the parser documentation.

arp

arp | jc -p --arp          # or:  jc -p arp

[
  {
    "address": "gateway",
    "hwtype": "ether",
    "hwaddress": "00:50:56:f7:4a:fc",
    "flags_mask": "C",
    "iface": "ens33"
  },
  {
    "address": "192.168.71.1",
    "hwtype": "ether",
    "hwaddress": "00:50:56:c0:00:08",
    "flags_mask": "C",
    "iface": "ens33"
  },
  {
    "address": "192.168.71.254",
    "hwtype": "ether",
    "hwaddress": "00:50:56:fe:7a:b4",
    "flags_mask": "C",
    "iface": "ens33"
  }
]

CSV files

cat homes.csv

"Sell", "List", "Living", "Rooms", "Beds", "Baths", "Age", "Acres", "Taxes"
142, 160, 28, 10, 5, 3,  60, 0.28,  3167
175, 180, 18,  8, 4, 1,  12, 0.43,  4033
129, 132, 13,  6, 3, 1,  41, 0.33,  1471
...

cat homes.csv | jc -p --csv

[
  {
    "Sell": "142",
    "List": "160",
    "Living": "28",
    "Rooms": "10",
    "Beds": "5",
    "Baths": "3",
    "Age": "60",
    "Acres": "0.28",
    "Taxes": "3167"
  },
  {
    "Sell": "175",
    "List": "180",
    "Living": "18",
    "Rooms": "8",
    "Beds": "4",
    "Baths": "1",
    "Age": "12",
    "Acres": "0.43",
    "Taxes": "4033"
  },
  {
    "Sell": "129",
    "List": "132",
    "Living": "13",
    "Rooms": "6",
    "Beds": "3",
    "Baths": "1",
    "Age": "41",
    "Acres": "0.33",
    "Taxes": "1471"
  }
]

/etc/hosts file

cat /etc/hosts | jc -p --hosts

[
  {
    "ip": "127.0.0.1",
    "hostname": [
      "localhost"
    ]
  },
  {
    "ip": "::1",
    "hostname": [
      "ip6-localhost",
      "ip6-loopback"
    ]
  },
  {
    "ip": "fe00::0",
    "hostname": [
      "ip6-localnet"
    ]
  }
]

ifconfig

ifconfig | jc -p --ifconfig          # or:  jc -p ifconfig

[
  {
    "name": "ens33",
    "flags": 4163,
    "state": [
      "UP",
      "BROADCAST",
      "RUNNING",
      "MULTICAST"
    ],
    "mtu": 1500,
    "ipv4_addr": "192.168.71.137",
    "ipv4_mask": "255.255.255.0",
    "ipv4_bcast": "192.168.71.255",
    "ipv6_addr": "fe80::c1cb:715d:bc3e:b8a0",
    "ipv6_mask": 64,
    "ipv6_scope": "0x20",
    "mac_addr": "00:0c:29:3b:58:0e",
    "type": "Ethernet",
    "rx_packets": 8061,
    "rx_bytes": 1514413,
    "rx_errors": 0,
    "rx_dropped": 0,
    "rx_overruns": 0,
    "rx_frame": 0,
    "tx_packets": 4502,
    "tx_bytes": 866622,
    "tx_errors": 0,
    "tx_dropped": 0,
    "tx_overruns": 0,
    "tx_carrier": 0,
    "tx_collisions": 0,
    "metric": null
  }
]

INI files

cat example.ini

foo = fiz
bar = buz

[section1]
fruit = apple
color = blue

[section2]
fruit = pear
color = green

cat example.ini | jc -p --ini

{
  "foo": "fiz",
  "bar": "buz",
  "section1": {
    "fruit": "apple",
    "color": "blue"
  },
  "section2": {
    "fruit": "pear",
    "color": "green"
  }
}

ls

$ ls -l /usr/bin | jc -p --ls          # or:  jc -p ls -l /usr/bin

[
  {
    "filename": "apropos",
    "link_to": "whatis",
    "flags": "lrwxrwxrwx.",
    "links": 1,
    "owner": "root",
    "group": "root",
    "size": 6,
    "date": "Aug 15 10:53"
  },
  {
    "filename": "ar",
    "flags": "-rwxr-xr-x.",
    "links": 1,
    "owner": "root",
    "group": "root",
    "size": 62744,
    "date": "Aug 8 16:14"
  },
  {
    "filename": "arch",
    "flags": "-rwxr-xr-x.",
    "links": 1,
    "owner": "root",
    "group": "root",
    "size": 33080,
    "date": "Aug 19 23:25"
  }
]

netstat

netstat -apee | jc -p --netstat          # or:  jc -p netstat -apee

[
  {
    "proto": "tcp",
    "recv_q": 0,
    "send_q": 0,
    "local_address": "localhost",
    "foreign_address": "0.0.0.0",
    "state": "LISTEN",
    "user": "systemd-resolve",
    "inode": 26958,
    "program_name": "systemd-resolve",
    "kind": "network",
    "pid": 887,
    "local_port": "domain",
    "foreign_port": "*",
    "transport_protocol": "tcp",
    "network_protocol": "ipv4"
  },
  {
    "proto": "tcp6",
    "recv_q": 0,
    "send_q": 0,
    "local_address": "[::]",
    "foreign_address": "[::]",
    "state": "LISTEN",
    "user": "root",
    "inode": 30510,
    "program_name": "sshd",
    "kind": "network",
    "pid": 1186,
    "local_port": "ssh",
    "foreign_port": "*",
    "transport_protocol": "tcp",
    "network_protocol": "ipv6"
  },
  {
    "proto": "udp",
    "recv_q": 0,
    "send_q": 0,
    "local_address": "localhost",
    "foreign_address": "0.0.0.0",
    "state": null,
    "user": "systemd-resolve",
    "inode": 26957,
    "program_name": "systemd-resolve",
    "kind": "network",
    "pid": 887,
    "local_port": "domain",
    "foreign_port": "*",
    "transport_protocol": "udp",
    "network_protocol": "ipv4"
  },
  {
    "proto": "raw6",
    "recv_q": 0,
    "send_q": 0,
    "local_address": "[::]",
    "foreign_address": "[::]",
    "state": "7",
    "user": "systemd-network",
    "inode": 27001,
    "program_name": "systemd-network",
    "kind": "network",
    "pid": 867,
    "local_port": "ipv6-icmp",
    "foreign_port": "*",
    "transport_protocol": null,
    "network_protocol": "ipv6"
  },
  {
    "proto": "unix",
    "refcnt": 2,
    "flags": null,
    "type": "DGRAM",
    "state": null,
    "inode": 33322,
    "program_name": "systemd",
    "path": "/run/user/1000/systemd/notify",
    "kind": "socket",
    "pid": 1607
  }
]

/etc/passwd file

cat /etc/passwd | jc -p --passwd

[
  {
    "username": "root",
    "password": "*",
    "uid": 0,
    "gid": 0,
    "comment": "System Administrator",
    "home": "/var/root",
    "shell": "/bin/sh"
  },
  {
    "username": "daemon",
    "password": "*",
    "uid": 1,
    "gid": 1,
    "comment": "System Services",
    "home": "/var/root",
    "shell": "/usr/bin/false"
  }
]

ping

ping 8.8.8.8 -c 3 | jc -p --ping          # or:  jc -p ping 8.8.8.8 -c 3

{
  "destination_ip": "8.8.8.8",
  "data_bytes": 56,
  "pattern": null,
  "destination": "8.8.8.8",
  "packets_transmitted": 3,
  "packets_received": 3,
  "packet_loss_percent": 0.0,
  "duplicates": 0,
  "time_ms": 2005.0,
  "round_trip_ms_min": 23.835,
  "round_trip_ms_avg": 30.46,
  "round_trip_ms_max": 34.838,
  "round_trip_ms_stddev": 4.766,
  "responses": [
    {
      "type": "reply",
      "timestamp": null,
      "bytes": 64,
      "response_ip": "8.8.8.8",
      "icmp_seq": 1,
      "ttl": 118,
      "time_ms": 23.8,
      "duplicate": false
    },
    {
      "type": "reply",
      "timestamp": null,
      "bytes": 64,
      "response_ip": "8.8.8.8",
      "icmp_seq": 2,
      "ttl": 118,
      "time_ms": 34.8,
      "duplicate": false
    },
    {
      "type": "reply",
      "timestamp": null,
      "bytes": 64,
      "response_ip": "8.8.8.8",
      "icmp_seq": 3,
      "ttl": 118,
      "time_ms": 32.7,
      "duplicate": false
    }
  ]
}

ps

ps axu | jc -p --ps          # or:  jc -p ps axu

[
  {
    "user": "root",
    "pid": 1,
    "cpu_percent": 0.0,
    "mem_percent": 0.1,
    "vsz": 128072,
    "rss": 6784,
    "tty": null,
    "stat": "Ss",
    "start": "Nov09",
    "time": "0:08",
    "command": "/usr/lib/systemd/systemd --switched-root --system --deseria..."
  },
  {
    "user": "root",
    "pid": 2,
    "cpu_percent": 0.0,
    "mem_percent": 0.0,
    "vsz": 0,
    "rss": 0,
    "tty": null,
    "stat": "S",
    "start": "Nov09",
    "time": "0:00",
    "command": "[kthreadd]"
  },
  {
    "user": "root",
    "pid": 4,
    "cpu_percent": 0.0,
    "mem_percent": 0.0,
    "vsz": 0,
    "rss": 0,
    "tty": null,
    "stat": "S<",
    "start": "Nov09",
    "time": "0:00",
    "command": "[kworker/0:0H]"
  }
]

traceroute

traceroute -m 2 8.8.8.8 | jc -p --traceroute
# or:  jc -p traceroute -m 2 8.8.8.8

{
  "destination_ip": "8.8.8.8",
  "destination_name": "8.8.8.8",
  "hops": [
    {
      "hop": 1,
      "probes": [
        {
          "annotation": null,
          "asn": null,
          "ip": "192.168.1.254",
          "name": "dsldevice.local.net",
          "rtt": 6.616
        },
        {
          "annotation": null,
          "asn": null,
          "ip": "192.168.1.254",
          "name": "dsldevice.local.net",
          "rtt": 6.413
        },
        {
          "annotation": null,
          "asn": null,
          "ip": "192.168.1.254",
          "name": "dsldevice.local.net",
          "rtt": 6.308
        }
      ]
    },
    {
      "hop": 2,
      "probes": [
        {
          "annotation": null,
          "asn": null,
          "ip": "76.220.24.1",
          "name": "76-220-24-1.lightspeed.sntcca.sbcglobal.net",
          "rtt": 29.367
        },
        {
          "annotation": null,
          "asn": null,
          "ip": "76.220.24.1",
          "name": "76-220-24-1.lightspeed.sntcca.sbcglobal.net",
          "rtt": 40.197
        },
        {
          "annotation": null,
          "asn": null,
          "ip": "76.220.24.1",
          "name": "76-220-24-1.lightspeed.sntcca.sbcglobal.net",
          "rtt": 29.162
        }
      ]
    }
  ]
}

uptime

uptime | jc -p --uptime          # or:  jc -p uptime

{
  "time": "11:35",
  "uptime": "3 days, 4:03",
  "users": 5,
  "load_1m": 1.88,
  "load_5m": 2.0,
  "load_15m": 1.94,
  "time_hour": 11,
  "time_minute": 35,
  "time_second": null,
  "uptime_days": 3,
  "uptime_hours": 4,
  "uptime_minutes": 3,
  "uptime_total_seconds": 273780
}

XML files

cat cd_catalog.xml

<?xml version="1.0" encoding="UTF-8"?>
<CATALOG>
  <CD>
    <TITLE>Empire Burlesque</TITLE>
    <ARTIST>Bob Dylan</ARTIST>
    <COUNTRY>USA</COUNTRY>
    <COMPANY>Columbia</COMPANY>
    <PRICE>10.90</PRICE>
    <YEAR>1985</YEAR>
  </CD>
  <CD>
    <TITLE>Hide your heart</TITLE>
    <ARTIST>Bonnie Tyler</ARTIST>
    <COUNTRY>UK</COUNTRY>
    <COMPANY>CBS Records</COMPANY>
    <PRICE>9.90</PRICE>
    <YEAR>1988</YEAR>
  </CD>
  ...

cat cd_catalog.xml | jc -p --xml

{
  "CATALOG": {
    "CD": [
      {
        "TITLE": "Empire Burlesque",
        "ARTIST": "Bob Dylan",
        "COUNTRY": "USA",
        "COMPANY": "Columbia",
        "PRICE": "10.90",
        "YEAR": "1985"
      },
      {
        "TITLE": "Hide your heart",
        "ARTIST": "Bonnie Tyler",
        "COUNTRY": "UK",
        "COMPANY": "CBS Records",
        "PRICE": "9.90",
        "YEAR": "1988"
      }
    ]
  }
}

YAML files

cat istio.yaml 

apiVersion: "authentication.istio.io/v1alpha1"
kind: "Policy"
metadata:
  name: "default"
  namespace: "default"
spec:
  peers:
  - mtls: {}
---
apiVersion: "networking.istio.io/v1alpha3"
kind: "DestinationRule"
metadata:
  name: "default"
  namespace: "default"
spec:
  host: "*.default.svc.cluster.local"
  trafficPolicy:
    tls:
      mode: ISTIO_MUTUAL

cat istio.yaml | jc -p --yaml

[
  {
    "apiVersion": "authentication.istio.io/v1alpha1",
    "kind": "Policy",
    "metadata": {
      "name": "default",
      "namespace": "default"
    },
    "spec": {
      "peers": [
        {
          "mtls": {}
        }
      ]
    }
  },
  {
    "apiVersion": "networking.istio.io/v1alpha3",
    "kind": "DestinationRule",
    "metadata": {
      "name": "default",
      "namespace": "default"
    },
    "spec": {
      "host": "*.default.svc.cluster.local",
      "trafficPolicy": {
        "tls": {
          "mode": "ISTIO_MUTUAL"
        }
      }
    }
  }
]

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