Jonathan Lai agsdot

Resizing a partition and filesystem on a headless Raspberry Pi running Arch Linux using a USB drive

disclaimer: this worked for me, your mileage may vary. Your Pi, your responsibility :)

After putting Arch Linux on a 16GB SD card using these instructions, I ended up with about 14GB of free space.

Arch Linux uses one primary partition (/dev/mmcblk0p1) and an extended partition (/dev/mmcblk0p2) containing one logical partition (/dev/mmcblk0p5). The primary partition is the boot partition and the logical partition is the root partition. Rather than adding another primary partition I just wanted to resize the root partition and filesystem.

According to this bugreport parted no longer handles resizing of partitions and gparted needs a graphical environment to run. So I had to come up with something else to resize my partitions.

How do I prompt for input in a Linux shell script?

Edit 2015-10-29: Adding readline's history capacity Depending on posix compliant: could work on poor system with generic shell environments bash specific: using so called bashisms and if you want simple in line question / answer (generic solutions) pretty formated interfaces, like ncurses or more graphical using libgtk or libqt... use powerful readline history capability (new oct 2015)

Long Live CoffeeScript and Long Live ES6

Clearly ES6 is a huge improvement over ES5, and tools like [6to5][] allow us to use these cool features now. I was reading [Replace CoffeeScript with ES6][replace coffeescript] by [Blake Williams][] and thought it was a great summary of how ES6 solves many of the same problems that CoffeeScript solves; however I'd like to comment on a few of Blake's points and talk about why I'll be sticking with CoffeeScript.

Classes

Classes in ES6 (like many of the syntax changes in ES6) are very similar to the CoffeeScript equivalent. To support browsers that are not fully ES5 compliant (e.g. IE8-), however, we still can't really use getters/setters, so ignoring these the comparison is:

	# This is a general-purpose function to ask Yes/No questions in Bash, either
	# with or without a default answer. It keeps repeating the question until it
	# gets a valid answer.

	ask() {
	# http://djm.me/ask
	local prompt default REPLY

	while true; do

	$ brew update && brew doctor # Repeat, until you've done all the Dr. has ordered!
	$ brew install postgresql # You'll need postgres to do this... you may also need to 'initdb' as well. Google it.

	$ brew install elixir
	$ mix local.hex # Answer y to any Qs
	$ createuser -d postgres # create the default 'postgres' user that Chris McCord seems to like -- I don't create mine w/a pw...

	# Use the latest Phoenix from here: http://www.phoenixframework.org/docs/installation -- currently this is 1.0.3
	# Answer y to any Qs
	$ mix archive.install https://github.com/phoenixframework/phoenix/releases/download/v1.0.3/phoenix_new-1.0.3.ez

	Annotator.js works on Drupal as two modules and a library (installed, as usual, under /sites/all):
	/modules/annotator
	/modules/annotation
	/libraries/annotator
	The files in libraries/annotator are the latest from the Annotator.js repo (https://github.com/openannotation/annotator/releases). Although the modules Infinite Ulysses uses have been significantly changed from the modules you could download on Drupal.org, the Drupal.org Annotator (https://www.drupal.org/project/annotator) and Annotation (https://www.drupal.org/project/annotation) modules pages might still have useful info if you're troubleshooting.

	Instructions:
	I'll refer to the two modules as "Annotator" and "Annotation" throughout, and use "libraries/annotator" if I'm referring to the JS library.

	1. Rename /libraries/annotator folder as just "annotator" and place in your sites/all/libraries folder (create a libraries folder there if you don't already have one).

	var Hapi = require('hapi');
	var Bell = require('bell');
	var AuthCookie = require('hapi-auth-cookie');

	var server = new Hapi.Server();
	server.connection({ port: 9001 });

	server.register([Bell, AuthCookie], function (err) {

	if (err) {

	/**
	* Simple authentication and authorization example with passport, node_acl,
	* MongoDB and expressjs
	*
	* The example shown here uses local userdata and sessions to remember a
	* logged in user. Roles are persistent all the way and applied to user
	* after logging in.
	*
	* Usage:
	* 1. Start this as server

	# If you worked with React and JSX you probably noticed that you can't use JS comments when inside JSX sections
	# Add this to your Atom init script
	# Then add 'ctrl-cmd-/': 'comment-jsx' to your keymap.cson
	# Then when you are on a JS/JSX file, just press cmd+ctrl+/ to use JSX-style comments that work with JSX elements
	# Is not the most efficient way, but it's the cleanest and reliable one

	atom.commands.add 'atom-workspace', 'comment-jsx', ->
	atom.config.set('editor.commentStart', '{/*', {scopeSelector: '.source.js.jsx'})
	atom.config.set('editor.commentEnd', '*/}', {scopeSelector: '.source.js.jsx'})
	for selection in atom.workspace.getActiveTextEditor().selections