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More recent resolution:

1. cd ~/../../etc (go to etc folder in WSL).
2. echo "[network]" | sudo tee wsl.conf (Create wsl.conf file and add the first line).
3. echo "generateResolvConf = false" | sudo tee -a wsl.conf (Append wsl.conf the next line).
4. wsl --terminate Debian (Terminate WSL in Windows cmd, in case is Ubuntu not Debian).
5. cd ~/../../etc (go to etc folder in WSL).
6. sudo rm -Rf resolv.conf (Delete the resolv.conf file).
7. In windows cmd, ps or terminal with the vpn connected do: Get-NetIPInterface or ipconfig /all for get the dns primary and
secondary.

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Recipe: from MQTT to InfluxDB via Node-RED

• 2024-05-16 adds case study explaining how to extract values from topic strings, and how to specify the measurement name in the message payload provided to the "influxdb out" node.
• 2023-12-02 revise graphics to correspond with "influxdb out" node, and explain the pros and cons of InfluxDB 1.8 vs InfluxDB 2.

Introduction

Getting data produced by IoT sensors into a database is practically a mandatory step before effective visualisation (eg dashboards).

This recipe shows you how to get an MQTT payload into an InfluxDB database using three Node-RED nodes. It makes the following assumptions:

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#!/usr/bin/env perl

use strict;
use warnings;

sub open_file_manager {
	my $vm = shift;
	exec {'qvm-run'} ('qvm-run', '--', $vm, 'exec nautilus --new-window --no-desktop </dev/null >/dev/null') or die "qvm-run exec failed\n";
}

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" hide hidden chars
:set nolist

" show hidden characters in Vim
:set list

" settings for hidden chars
" what particular chars they are displayed with
:set lcs=tab:▒░,trail:▓,nbsp:░
" or

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#for an image ("not running container") use save:
docker save <dockernameortag> | gzip > mycontainer.tgz

#for running or paused docker, use export:
docker export <dockernameortag> | gzip > mycontainer.tgz

#load
gunzip -c mycontainer.tgz | docker load

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#!/bin/bash
SSH_REDIR_PORT=12345
SSH_D="cloud_sshd"
COMMAND="ssh -R $SSH_REDIR_PORT:localhost:22 $SSH_D -N -f"
pgrep -f "ssh -R $SSH_REDIR_PORT:localhost:22" > /dev/null 2>&1 || (eval $COMMAND && echo $COMMAND)

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Lee Benfield's Java decompiler CFR is straight forward and can even batch decompile jar container. 

1. Download the most recent version of CFR (crf 0.1.15 at the time of writing)

wget http://www.benf.org/other/cfr/cfr_0_115.jar

2. Run decompile with output into terminal

java -jar cfr_0_115.jar javaclasstodecompiles.class

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NOTE

See https://gist.github.com/cerebrate/d40c89d3fa89594e1b1538b2ce9d2720#gistcomment-3563688 below before doing anything else.

Recompile your WSL2 kernel - support for snaps, apparmor, lxc, etc.

Yes, I've done this, and yes, it works. It is, however, entirely unsupported and assembled through reasonable guesswork, so if you try this and it explodes your computer, brain, career, relationships, or anything else, you agree that you take sole responsibility for doing it, that I never claimed it was a good idea, and that you didn't get these instructions from me .

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Node-RED Radius custom authentication and authorization

Requirements

• node-radius-client

Installation

1. Save user-authentication.js to <node-red>/user-authentication.js.
2. Add the following line to setting.js:

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#-*- coding: utf-8 -*-
import subprocess

if __name__ == '__main__':
  ps = subprocess.Popen(['nodejs','ps2.js'], stdin=subprocess.PIPE, stdout=subprocess.PIPE)

  out = ps.communicate(input='http://www.daum.net'.encode())[0]
  print(out.decode('utf-8'))