Jiří Altman JuryA

Simulate a scanned PDF with ImageMagick

Download and install Ghostscript and ImageMagick + Convert Module
Execute the following command in the console (change the filename)

$ convert -density 200 INPUT.pdf -rotate 0.3 +noise Multiplicative -format pdf  -quality 85 -compress JPEG -colorspace gray OUTPUT.pdf

Description of the options

-density: set the input DPI to 200
-rotate: set Page rotation to 0.3 degrees

Commit Message Guidelines

Short (72 chars or less) summary

More detailed explanatory text. Wrap it to 72 characters. The blank
line separating the summary from the body is critical (unless you omit
the body entirely).

Write your commit message in the imperative: "Fix bug" and not "Fixed
bug" or "Fixes bug." This convention matches up with commit messages

Best Fonts for Programming

To be the best, a font generally has these capabilities:

Unicode Support (https://en.wikipedia.org/wiki/Unicode_font)
Monospaced
Has ligatures
Open Source and/or Platform Support
Should Look Good

Virtual Serial Ports

We can use socat to create 2 virtual serial ports that are connected to each other locally. This can be useful for debugging serial port applications. Or simulating serial port communication. Or running 2 legacy programs that only communicate with each other over serial ports, such as old DOS games. And of course, for education, since serial communication is probably the most simple communication protocol there is, RS232 is considered at the bottom of the OSI stack, at the "Physical Layer". See: http://electronics.stackexchange.com/questions/31171/internet-vs-serial-communication

QEMU arm64 cloud server emulation

This is basically a rehash of an original post on CNXSoft - all credit (particularly for the Virtio device arguments used below) belongs to the author of that piece.

Download the latest uefi1.img image. E.g. ubuntu-16.04-server-cloudimg-arm64-uefi1.img from https://cloud-images.ubuntu.com/releases/16.04/release/

Download the UEFI firmware image QEMU_EFI.fd from https://releases.linaro.org/components/kernel/uefi-linaro/latest/release/qemu64/

Determine your current username and get your current ssh public key:

	Set-ExecutionPolicy Bypass -Scope Process -Force; iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))

	choco feature enable -n allowGlobalConfirmation
	choco install chocolateygui notepadplusplus googlechrome 7zip adobereader jre8 vlc git putty powershell ccleaner sysinternals teamviewer itunes winscp totalcommander
	choco install docker-for-windows vagrant lastpass lastpass-chrome
	choco install rufus python python2 cmder sudo tftpd32

	# Get settings to enter on the Identity Provider (IdP) to allow authentication to Service Provider (SP)
	function Get-IdP-Settings-From-SP($Metadata) {
	[xml]$SPMetadata = $Metadata
	$SPAssertionConsumerServiceURL = $SPMetadata.EntityDescriptor.SPSSODescriptor.AssertionConsumerService \|
	? {$_.Binding -eq "urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST"} \|
	% {$_.Location}
	$SPIssuerURI = $SPMetadata.EntityDescriptor.entityID
	$SPSignatureCertificate = $SPMetadata.EntityDescriptor.SPSSODescriptor.KeyDescriptor \|
	? {$_.use -eq "signing"} \|
	Select-Object -Last 1 \|

	$sourcePath = 'HKLM:\software\Microsoft\Speech_OneCore\Voices\Tokens' #Where the OneCore voices live
	$destinationPath = 'HKLM:\SOFTWARE\Microsoft\Speech\Voices\Tokens' #For 64-bit apps
	$destinationPath2 = 'HKLM:\SOFTWARE\WOW6432Node\Microsoft\SPEECH\Voices\Tokens' #For 32-bit apps
	cd $destinationPath
	$listVoices = Get-ChildItem $sourcePath
	foreach($voice in $listVoices)
	{
	$source = $voice.PSPath #Get the path of this voices key
	copy -Path $source -Destination $destinationPath -Recurse
	copy -Path $source -Destination $destinationPath2 -Recurse


	start <- as.Date("2014-01-01")
	end <- as.Date("2017-01-01")
	range <- as.numeric(end - start)
	m <- matrix(,nrow=range, ncol = 11)
	for (i in 1:11)
	{
	d<-runif(6)
	m[,i]<-spline(1:length(d),d,n=range)$y
	}