Fun with terminal plotting JSON data at the command line
One of the great thing about unix is the ability to pipe multiple programs together to manipulate data. Plain, unstructured text is the most common type of data that is passed between programs, but these days JSON is becoming more popular.
I thought it would be fun to pipe together some command line JSON tools to do some stupid terminal tricks, like plotting a graph of system statistics, like CPU or memory utilization.
We can use jc (disclosure: I wrote jc), jq, and jp to pull the output of uptime and display a line graph like this:
In this post I'll show you how you can build a quick bar graph of the CPU utilization of the top processes right in the terminal. For more information on how to create the animated line graph above, see my blog post at blog.kellybrazil.com.
first, get jc, jq, and jp.
Then you can use this one-liner to graph the output of ps:
Fun stuff! jq is an awesome JSON tool for the cli and is a bit like sed or awk for JSON. You'll find lots of uses for manipulating JSON as more and more programs start to output in the format.
Last edited by kbrazil; 01-16-2020 at 04:39 PM..
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Hai Friends
I have installed FreeBSD in my system... I have installed it to work in text mode don't have the GUI. The default text color is Black background with White Foreground. I want it to be with Black background with Green Foreground. How could i do that.
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0.12_0.008_fall_ff.out:bisect return: 0.08056640625
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{
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Discussion started by: manas_ranjan
4 Replies
LEARN ABOUT DEBIAN
jsonlint
JSONLINT(1) General Commands Manual JSONLINT(1)NAME
jsonlint - A JSON syntax validator and formatter tool
SYNOPSIS
jsonlint [-v][-s|-S][-f|-F][-ecodec]inputfile.json...
DESCRIPTION
This manual page documents briefly the jsonlint commands.
OPTIONS
The return status will be 0 if the file is legal JSON, or non-zero otherwise. Use -v to see the warning details.
Options are: -v, -s, -S, -f, -F, -e
-v, --verbose
Show details of lint checking
-s, --strict
Be strict in what is considered legal JSON (the default)
-S, --nonstrict
Be loose in what is considered legal JSON
-f, --format
Reformat the JSON (if legal) to stdout
-F, --format-compactly
Reformat the JSON simlar to -f, but do so compactly by removing all unnecessary whitespace
-e codec, --encoding=codec
--input-encoding=codec --output-encoding=codec
Set the input and output character encoding codec (e.g., ascii, utf8, utf-16). The -e will set both the input and output encodings
to the same thing. If not supplied, the input encoding is guessed according to the JSON specification. The output encoding
defaults to UTF-8, and is used when reformatting (via the -f or -F options).
When reformatting, all members of objects (associative arrays) are always output in lexigraphical sort order. The default output
codec is UTF-8, unless the -e option is provided. Any Unicode characters will be output as literal characters if the encoding per-
mits, otherwise they will be -escaped. You can use "-e ascii" to force all Unicode characters to be escaped.
AUTHOR
jsonlint was written by Deron Meranda <deron.meranda@gmail.com>.
This manual page was written by TANIGUCHI Takaki <takaki@debian.org>, for the Debian project (and may be used by others).
2009-12-01 JSONLINT(1)