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How to increase the root partition size on Fedora

Boot up with an Fedora Live USB stick.

Run vgs to check if there's any space:

$ sudo vgs
  VG     #PV #LV #SN Attr   VSize    VFree
  fedora   1   3   0 wz--n- <237.28g    0

using Ansible command line:

ansible-playbook --connection=local 127.0.0.1 playbook.yml

using inventory:

127.0.0.1 ansible_connection=local

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

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

How to patch Ubuntu for Heartbleed

sudo apt-get update
sudo apt-get install -y libssl1.0.0 openssl
openssl version -a and confirm the "built on" date is >= 2014-04-07
sudo lsof -n | grep ssl | grep DEL and restart all listed services.

Repeat #4 until no results are returned.

Server Status Squares

A Dashing widget that checks whether a server is responding to either an http or ping request using smaller squares to represent its status.

This is based off of the Server Status widget that willjohnson developed but modified to work across multiple squares rather than be one square with a list.

Description

The widget updates the appropriate squares color upon determining its status. Statuses are as follows:

	FROM quay.io/centos-boot/centos-tier-1-dev:stream9
	RUN rpm-ostree install gdm firefox gnome-kiosk-script-session plymouth-system-theme
	RUN rm -rf /var/lib/gdm/.config/pulse/default.pa && rm -rf /var/lib/xkb/README.compiled
	RUN echo -e "\
	#Enable autologin for the user core \n\
	# GDM configuration storage \n\
	[daemon] \n\
	# Uncomment the line below to force the login screen to use Xorg \n\
	#WaylandEnable=false \n\
	AutomaticLogin=core \n\

	# https://docs.ansible.com/ansible/latest/modules/dconf_module.html
	#
	# To determine what dconf keys and values to use, you can run `dconf watch /`
	# in a terminal as you make changes in settings or tweaks. You can also use
	# `dconf read <key>` and `dconf write <key> <value>` to experiment with various
	# settings. The dconf-editor application is also useful for exploring various
	# keys along with their descriptions.

	- hosts: localhost
	tasks:

	import os
	import urllib
	import urllib2
	import base64
	import json
	import sys
	import argparse
	try:
	import requests
	except ImportError:

	FROM ubuntu:14.04
	MAINTAINER Mason Fischer <[email protected]>
	RUN apt-get update && apt-get install -y nodejs