Jay the-moog

Proxmox VE tips

Just a somewhat chaotic list of personal Proxmox VE related tips/notes or interesting (to me) things I'm working on or experiemnt with.
Some of the things you see here are niche or purely experimental. I try to label them as such, but as always with random code snippets, make sure to review anything before running it in your own environment. Perhaps test in a virtual PVE first.

Please note that unless you see a shebang (#!/...) these code blocks are usually meant to be copy & pasted directly into the shell. Some of the steps will not work if you run part of them in a script and copy paste other ones as they rely on variables set before.
The { and } surrounding some scripts are meant to avoid cluttering your shell history with individual commands, etc. You can ignore them if you manually copy paste the individual commands.

What's a PPA?

I've recently been trying out Electron.js for a number of new projects and it's so great to work with. It's useful for building desktop applications as advertised, but also for applications running in kiosk mode, such as an ATM screen or embedded GUI. The development of an Electron application is outside the scope of this article, but I'm mentioning it because that process outputted the .deb file that I'll using in this article.

So what is a PPA? PPA stands for Personal Package Archive and it's a way for developers to create source packages for Ubuntu that can be built and published as an apt repository. When you add your repository to your sources list, Ubuntu can perform updates just like any other Ubuntu package. If any of this sounds like a foreign language, I recommend reading this PPA Guide.

Setting up the Server

First you'll want to update your ins

Install Wine with Mono & Gecko in Ubuntu 20.04

Warning: Do not try those command in your main PC, I test in a virtual Machine

Note: Most of commands are from the Dockerfile in Reference section. If you want to test wine, just run their docker container

1. Setup PPA

sudo dpkg --add-architecture i386
wget -qO - https://dl.winehq.org/wine-builds/winehq.key | sudo tee /etc/apt/trusted.gpg.d/winehq.asc

Here I'll explain how to use true Linux inside your Windows machine.

WSL

How to install

There are two possible ways:

Enable Windows Subsystem for Linux in Windows Features
Use following script in administrative PS-shell

Regular Expression Engine Comparison Chart

Many different applications claim to support regular expressions. But what does that even mean?

Well there are lots of different regular expression engines, and they all have different feature sets and different time-space efficiencies.

The information here is just copied from: http://regular-expressions.mobi/refflavors.html

Useful tip from the late creator of matplotlib, John Hunter.

http://matplotlib.1069221.n5.nabble.com/dynamically-add-subplots-to-figure-td23571.html

import matplotlib.pyplot as plt

# start with one
fig = plt.figure()
ax = fig.add_subplot(111)

Source: http://willandorla.com/will/2011/01/convert-folder-into-git-submodule/

1. Clone new repository

$ git clone --no-hardlinks original-repo copied-repo

2. Filter out the files you want to keep and remove the others

Sending one datastream to a unix command is made by piping (e.g. zcat seq1.fq.gz | seqs). These examples demonstrate how to pipe multiple data streams to one *nix command.

Credit and additional examples:

Process substitution

This works in bash and zsh, but not csh shells.

	# the following 3 lines of PowerShell creates an Internal Switch on Hyper-V (https://www.petenetlive.com/KB/Article/0001384)

	New-VMSwitch -SwitchName "NAT-Switch" -SwitchType Internal
	New-NetIPAddress -IPAddress 192.168.200.1 -PrefixLength 24 -InterfaceAlias "vEthernet (NAT-Switch)"
	New-NetNAT -Name "NAT-Network" -InternalIPInterfaceAddressPrefix 192.168.200.0/24

	# the following line of PowerShell creates a DNAT rule (80->80) from the outside into a VM (previously created an running on the Switch with IP .10) (https://www.petri.com/create-nat-rules-hyper-v-nat-virtual-switch)

	Add-NetNatStaticMapping -ExternalIPAddress "0.0.0.0/24" -ExternalPort 80 -Protocol TCP -InternalIPAddress "192.168.200.10" -InternalPort 80 -NatName NAT-Network