Try the jc web demo

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

JC

JSON CLI output utility

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

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

The jc parsers can also be used as python modules. In this case the output will be a python dictionary, or list of dictionaries, instead of JSON:

>>> import subprocess
>>> import jc.parsers.dig
>>> 
>>> cmd_output = subprocess.check_output(['dig', 'example.com'], text=True)
>>> data = jc.parsers.dig.parse(cmd_output)
>>>
>>> data
[{'id': 64612, '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': 29658, 'data': '93.184.216.34'}], 'query_time': 52, 'server':
'2600:1700:bab0:d40::1#53(2600:1700:bab0:d40::1)', 'when': 'Fri Apr 16 16:13:00 PDT 2021', 'rcvd': 56,
'when_epoch': 1618614780, 'when_epoch_utc': None}]

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().

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

Release notes can be found here.

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.

Installation

There are several ways to get jc. You can install via pip, OS package repositories, via DEB/RPM/MSI packaged binaries for linux and Windows, 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`
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`

For more packages and binaries, see the jc packaging site.

Usage

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

COMMAND | jc PARSER [OPTIONS]

Alternatively, the "magic" syntax can be used by prepending jc to the command to be converted. Options can be passed to jc immediately before the command is given. (Note: command aliases and shell builtins are not supported)

jc [OPTIONS] COMMAND

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

Parsers

--acpi enables the acpi command parser (documentation)
--airport enables the airport -I command parser (documentation)
--airport-s enables the airport -s command parser (documentation)
--arp enables the arp command parser (documentation)
--blkid enables the blkid command parser (documentation)
--cksum enables the cksum and sum command parser (documentation)
--crontab enables the crontab command and file parser (documentation)
--crontab-u enables the crontab file parser with user support (documentation)
--csv enables the CSV file parser (documentation)
--csv-s enables the CSV file streaming parser (documentation)
--date enables the date command parser (documentation)
--df enables the df command parser (documentation)
--dig enables the dig command parser (documentation)
--dir enables the dir command parser (documentation)
--dmidecode enables the dmidecode command parser (documentation)
--dpkg-l enables the dpkg -l command parser (documentation)
--du enables the du command parser (documentation)
--env enables the env command parser (documentation)
--file enables the file command parser (documentation)
--finger enables the finger command parser (documentation)
--free enables the free command parser (documentation)
--fstab enables the /etc/fstab file parser (documentation)
--group enables the /etc/group file parser (documentation)
--gshadow enables the /etc/gshadow file parser (documentation)
--hash enables the hash command parser (documentation)
--hashsum enables the hashsum command parser (md5sum, shasum, etc.) (documentation)
--hciconfig enables the hciconfig command parser (documentation)
--history enables the history command parser (documentation)
--hosts enables the /etc/hosts file parser (documentation)
--id enables the id command parser (documentation)
--ifconfig enables the ifconfig command parser (documentation)
--ini enables the INI file parser (documentation)
--iostat enables the iostat command parser (documentation)
--iostat-s enables the iostat command streaming parser (documentation)
--iptables enables the iptables command parser (documentation)
--iw-scan enables the iw dev [device] scan command parser (documentation)
--jobs enables the jobs command parser (documentation)
--kv enables the Key/Value file parser (documentation)
--last enables the last and lastb command parser (documentation)
--ls enables the ls command parser (documentation)
--ls-s enables the ls command streaming parser (documentation)
--lsblk enables the lsblk command parser (documentation)
--lsmod enables the lsmod command parser (documentation)
--lsof enables the lsof command parser (documentation)
--lsusb enables the lsusb command parser (documentation)
--mount enables the mount command parser (documentation)
--netstat enables the netstat command parser (documentation)
--ntpq enables the ntpq -p command parser (documentation)
--passwd enables the /etc/passwd file parser (documentation)
--ping enables the ping and ping6 command parser (documentation)
--ping-s enables the ping and ping6 command streaming parser (documentation)
--pip-list enables the pip list command parser (documentation)
--pip-show enables the pip show command parser (documentation)
--ps enables the ps command parser (documentation)
--route enables the route command parser (documentation)
--rpm-qi enables the rpm -qi command parser (documentation)
--sfdisk enables the sfdisk command parser (documentation)
--shadow enables the /etc/shadow file parser (documentation)
--ss enables the ss command parser (documentation)
--stat enables the stat command parser (documentation)
--sysctl enables the sysctl command parser (documentation)
--systemctl enables the systemctl command parser (documentation)
--systemctl-lj enables the systemctl list-jobs command parser (documentation)
--systemctl-ls enables the systemctl list-sockets command parser (documentation)
--systemctl-luf enables the systemctl list-unit-files command parser (documentation)
--systeminfo enables the systeminfo command parser (documentation)
--time enables the /usr/bin/time command parser (documentation)
--timedatectl enables the timedatectl status command parser (documentation)
--tracepath enables the tracepath and tracepath6 command parser (documentation)
--traceroute enables the traceroute and traceroute6 command parser (documentation)
--ufw enables the ufw status command parser (documentation)
--ufw-appinfo enables the ufw app info [application] command parser (documentation)
--uname enables the uname -a command parser (documentation)
--upower enables the upower command parser (documentation)
--uptime enables the uptime command parser (documentation)
--vmstat enables the vmstat command parser (documentation)
--vmstat-s enables the vmstat command streaming parser (documentation)
--w enables the w command parser (documentation)
--wc enables the wc command parser (documentation)
--who enables the who command parser (documentation)
--xml enables the XML file parser (documentation)
--yaml enables the YAML file parser (documentation)

Options

-a about jc. Prints information about jc and the parsers (in JSON, of course!)
-d debug mode. Prints trace messages if parsing issues are encountered (use -dd for verbose debugging)
-h help. Use jc -h --parser_name for parser documentation
-m monochrome JSON output
-p pretty format the JSON output
-q quiet mode. Suppresses parser warning messages (use -qq to ignore streaming parser errors)
-r raw output. Provides a more literal JSON output, typically with string values and no additional semantic processing
-u unbuffer output
-v version information

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`

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

JC_COLORS=default,default,default,default

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 outputing 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","response_ip":"1.1.1.1","icmp_seq":"1","ttl":"128","time_ms":"24.6","duplicate":false}
{"type":"reply","pattern":null,"timestamp":null,"bytes":"64","response_ip":"1.1.1.1","icmp_seq":"2","ttl":"128","time_ms":"26.8","duplicate":false}
...

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

Using Streaming Parsers as Python Modules

Streaming parsers accept any iterable object and return a generator iterator 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 generator object in your code, simply loop through it or use the next() builtin function:

import jc.parsers.ls_s

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

Custom Parsers

Custom local 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

Local 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.

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

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

Caveats

Locale

For best results set the LANG locale environment variable to C or en_US.UTF-8. For example, either by setting directly on the command-line:

$ LANG=C date | jc --date

or by exporting to the environment before running commands:

$ export LANG=C

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.

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 an 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 --lsof -q

or Windows:

type lsof.out | jc --lsof -q

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 --arp -p          # 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 --csv -p

[
  {
    "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 --hosts -p

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

ifconfig

ifconfig | jc --ifconfig -p          # 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

[DEFAULT]
ServerAliveInterval = 45
Compression = yes
CompressionLevel = 9
ForwardX11 = yes

[bitbucket.org]
User = hg

[topsecret.server.com]
Port = 50022
ForwardX11 = no

cat example.ini | jc --ini -p

{
  "bitbucket.org": {
    "serveraliveinterval": "45",
    "compression": "yes",
    "compressionlevel": "9",
    "forwardx11": "yes",
    "user": "hg"
  },
  "topsecret.server.com": {
    "serveraliveinterval": "45",
    "compression": "yes",
    "compressionlevel": "9",
    "forwardx11": "no",
    "port": "50022"
  }
}

ls

$ ls -l /usr/bin | jc --ls -p          # 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 --netstat -p          # 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 --passwd -p

[
  {
    "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 --ping -p          # 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 --ps -p          # 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 --deserialize 22"
  },
  {
    "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 --traceroute -p          # 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 --uptime -p          # 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 --xml -p

{
  "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 --yaml -p

[
  {
    "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"
        }
      }
    }
  }
]

HU-MA/jc

JC