Marc Hanheide marc-hanheide

How to create a patch for a repository with submodules

You checkout whatever repository you want.

Then you make all the changes that are required to make it all work in any submodule as needed. You don't commit in the submodules.

Make sure you have committed everything in your own repository and git diff shows that there are only changes in your submodules and you "parent" repository is still clean.

git --no-pager diff --no-color --submodule=diff &gt; patch.diff

How to mount a qcow2 disk image

This is a quick guide to mounting a qcow2 disk images on your host server. This is useful to reset passwords, edit files, or recover something without the virtual machine running.

Step 1 - Enable NBD on the Host

modprobe nbd max_part=8

Using virtual VNC Xserver over guacamole

Installation

Install sudo apt-get install xfce4-session xfce4-goodies xrdp tigervnc-standalone-server
The files /etc/xrdp/sesman.ini and /etc/xrdp/xrdp.ini may have to edited as in this gist, but it may work also with default configs
For reconnections (in guacamole) to existing session to work, the resolution in guacamole for the connection should be fixed (e.g. to 1280x900 in the connection settings)
Each user who wants to use it, should have the files ~/.xsession and ~/.vnc/xstartup with the defaults in this gist in their home directory

	#!/usr/bin/env bash
	############################################################
	# MIGRATED TO REPOSITORY
	# https://github.com/tavinus/cloudsend.sh
	#
	# This gist will NOT be updated anymore
	############################################################


	############################################################

	version: '3'
	services:
	novnc_desktop_bionic:
	image: lcas.lincoln.ac.uk/lcas/novnc-desktop-standalone:bionic
	ports:
	- 6080:6080
	restart: always
	volumes:
	- userhome:/home/lcas
	cap_add:

	# First get powershell (also available for Mac) ;-)

	# Install Teams module in powershell (once)
	Install-Module -Name MicrosoftTeams

	# Connect to Teams
	Connect-MicrosoftTeams

	# Find the Team (can take a while):
	Get-Team -DisplayName "UoL-SAGA Code camp 2021"

	#!/bin/bash

	FILEPATH="$1"
	SHARED_TOKEN="Xp749RSG2K4NknT"
	URL="https://lcas.lincoln.ac.uk/nextcloud/public.php/webdav"
	FILENAME="`basename $FILEPATH`"

	curl -X PUT -T "$FILEPATH" -u "$SHARED_TOKEN:" $URL/$FILENAME

	#!/bin/bash

	SUBNET="10.5.42.0/24

	# compare the output to your ~/.ssh/known_hosts list

	for ip in `nmap -p 22 --open -oG - $SUBNET \| grep '22/open' \| cut -f2 -d" " `; do key="`ssh-keyscan -H -t rsa $ip 2>&1\| grep -v '^# '`"; if [ "$key" ]; then echo "$ip $key"; fi ; done

	#!/bin/sh
	python -c "import requests; print(str(requests.get('https://icanhazip.com').text))"

	# set all variables
	KEY_BITS=4096
	CA_PRIVATE_KEY_NAME="certificate_authority_private_key.key"
	CA_CERT_NAME="certificate_authority_root_certificate.cert"
	DAYS_VALID=365
	# these are subject variables to be added into the certificate
	CA_COUNTRY_CODE="GB"
	CA_PROVINCE="Lincolnshire"
	CA_LOCATION="Lincoln"
	CA_ORGANISATION="University of lincoln"

Marc Hanheide marc-hanheide

How to create a patch for a repository with submodules

How to mount a qcow2 disk image

Using virtual VNC Xserver over guacamole

Installation

Without Guacamole