Peter Lightbody pet1330

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

	This is free and unencumbered software released into the public domain.

	Anyone is free to copy, modify, publish, use, compile, sell, or
	distribute this software, either in source code form or as a compiled
	binary, for any purpose, commercial or non-commercial, and by any
	means.

	In jurisdictions that recognize copyright laws, the author or authors
	of this software dedicate any and all copyright interest in the
	software to the public domain. We make this dedication for the benefit

	class MainWidget(QtGui.QMainWindow):
	def __init__(self, parent=None):
	super(MainWidget, self).__init__(parent)
	self.setWindowTitle("FiFiFactory App")
	self.resize(720,480)
	self.setAcceptDrops(True)

	def dragEnterEvent(self, event):
	if event.mimeData().hasUrls():
	event.accept()

	# source this to set the dbus env in a gnome session

	export DISPLAY=:0
	PID=$(pgrep gnome-session)
	export DBUS_SESSION_BUS_ADDRESS=$(grep -z DBUS_SESSION_BUS_ADDRESS /proc/$PID/environ\|cut -d= -f2-)

	# You may now configure things in gsettings, e.g. run vino:
	gsettings reset org.gnome.Vino network-interface
	gsettings set org.gnome.Vino enabled true
	gsettings set org.gnome.Vino prompt-enabled false

	# Backup
	docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql

	# Restore
	cat backup.sql \| docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE

	<?php

	function tinker(...$args) {
	// Because there is no way of knowing what variable names
	// the caller of this function used with the php run-time,
	// we have to get clever. My solution is to peek at the
	// stack trace, open up the file that called "tinker()"
	// and parse out any variable names, so I can load
	// them in the tinker shell and preserve their names.

	#!/usr/bin/python

	def timeit(method):
	import time

	def timed(args, *kw):
	ts = time.time()
	result = method(args, *kw)
	te = time.time()
	if 'log_time' in kw:

	#!/usr/bin/python

	def rosbagit(method):
	import subprocess
	import roslib.packages

	def cachable(method):
	def cache_call(args, *kw):
	try:
	return method.__globals__[method]

	@lxpanel --profile LXDE
	@pcmanfm --desktop --profile LXDE
	@point-rpi
	@xset s off
	@xset -dpms
	@xset s noblank
	@sed -i 's/"exited_cleanly": false/"exited_cleanly": true/' ~/.config/chromium-browser/Default/Preferences
	@chromium-browser --noerrdialogs --disable-infobars --kiosk http://[YOUR_URL] --incognito
	#@xscreensaver -no-splash@

Peter Lightbody pet1330

How to mount a qcow2 disk image

Using virtual VNC Xserver over guacamole

Installation

Without Guacamole