James Veitch darth-veitcher

Autofs on Mac OS X

With autofs you can easily mount network volumes upon first access to the folder where you want to mount the volume. Autofs is available for many OS and is preinstalled on Mac OS X so I show you how I mounted my iTunes library folder using this method.

Prepare autofs to use a separate configuration file

autofs needs to be configured so that it knows where to gets its configuration. Edit the file /etc/auto_master and add the last line:

#
# Automounter master map
#

+auto_master # Use directory service

How to enable bind mount inside lxc container

When mount is returning:

STDERR: mount: block device /srv/database-data/postgres is write-protected, mounting read-only
mount: cannot mount block device /srv/database-data/postgres read-only

and dmesg shows:

Exporting a Networkx graph as a Cypher query

This little project defines a function that can be used to construct a Cypher query which when executed against a Neo4j database server will store the graph to the server.

Background

A Graph is an abstract mathematical model composed of Nodes connected through Edges that can be used to describe complex systems composed of a set of parts (corresponding to nodes) and their connections (corresponding to edges).
Examples of graphs are road networks (junctions connected via roads), electronic circuit networks (components and their connections) and others
Networkx is an excellent Python module for manipulating such Graph objects of any kind.
Neo4j is a graph database. It uses the Graph as a data model to store such objects to a data store.

	# Use hyper.is or iTerm2 as terminal emulators

	# Install ohmyzsh
	# https://github.com/robbyrussell/oh-my-zsh

	# Copy over configs from ~/.bash_profile
	# For example, it may have the nvm setup or any aliases like exa=ls and cat=bat

	# ~/.hyper.js configuration:
	copyOnSelect: true

	# Adapted from solution provided by http://stackoverflow.com/users/57719/chin-huang http://stackoverflow.com/a/31465939/348868
	# Scenario: You want to add a group to the list of the AllowGroups in ssh_config
	# before:
	# AllowGroups Group1
	# After:
	# AllowGroups Group1 Group2

	- name: Add Group to AllowGroups
	replace:
	backup: yes

	socat TCP-LISTEN:<localport> SOCKS4A:localhost:<host>:<remoteport>,socksport=9050

	# for example, to ssh into secret.shell.server.org via tor, do:
	$ socat TCP-LISTEN:22222 SOCKS4A:localhost:secret.shell.server.org:22,socksport=9050 &
	$ ssh localhost -p 22222

	"""
	Progress bar for rsync
	========================

	Shows file progress and total progress as a progress bar.

	Usage
	---------
	Run rsync with -P and pipe into this program. Example::

	client = paramiko.SSHClient()
	client._policy = paramiko.WarningPolicy()
	client.set_missing_host_key_policy(paramiko.AutoAddPolicy())

	ssh_config = paramiko.SSHConfig()
	user_config_file = os.path.expanduser("~/.ssh/config")
	if os.path.exists(user_config_file):
	with open(user_config_file) as f:
	ssh_config.parse(f)

	// GetWindowList
	// A utility for printing out the name and windowId for every current window.
	// Use in conjunction with 'screencapture -l' to automate screenshots.

	// compile with gcc thusly:
	// gcc -framework carbon -framework foundation -framework cocoa -x objective-c -std=c99 GetWindowList.c -o GetWindowList

	#include <Carbon/Carbon.h>
	#import <objc/Object.h>
	#import <Foundation/Foundation.h>

	# from https://libbits.wordpress.com/2011/04/09/get-total-rsync-progress-using-python/

	import subprocess
	import re
	import sys

	print('Dry run:')
	cmd = 'rsync -az --stats --dry-run ' + sys.argv[1] + ' ' + sys.argv[2]
	proc = subprocess.Popen(cmd,
	shell=True,