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An opinionated list of excellent Clojure learning materials

These resources (articles, books, and videos) are useful when you're starting to learn the language, or when you're learning a specific part of the language. This an opinionated list, no doubt. I've compiled this list from writing and teaching Clojure over the last 10 years.

🔴 Mandatory (for both beginners and intermediates)
🟩 For beginners
🟨 For intermediates

How to Generate & Use Private Keys using OpenSSL's Command Line Tool

These commands generate and use private keys in unencrypted binary (not Base64 “PEM”) PKCS#8 format. The PKCS#8 format is used here because it is the most interoperable format when dealing with software that isn't based on OpenSSL.

OpenSSL has a variety of commands that can be used to operate on private key files, some of which are specific to RSA (e.g. openssl rsa and openssl genrsa) or which have other limitations. Here we always use

Working with multiple SSH keys

Step 1. Ensure you have an SSH client installed

ssh -V
ls -a ~/.ssh

Step 2. Set up your identity

You can create a default identity

$ ssh-keygen

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

	(require '[cemerick.url :as url]
	'[clojure.spec.alpha :as s]
	'[clojure.spec.gen.alpha :as gen]
	'[clojure.string :as string])

	(def non-empty-string-alphanumeric
	"Generator for non-empty alphanumeric strings"
	(gen/such-that #(not= "" %)
	(gen/string-alphanumeric)))