How much memory is on my linux server? Run the free command free -g total used free shared buffers cached Mem: 2 1 0 0 0 1 -/+ buffers/cache: 0 1 Swap: ...

I just wrote and released my first Ruby Gem, Hashed Attributes https://rubygems.org/gems/hashed_attributes. It is a very simple ActiveRecord extension for saving variables through a serialized hash. The Gem will let you declare getter and setter methods t...

In the example below, I'm going to zip up a directory that includes images in both PNG and PSD file formats. However, I want to exclude the PSDs because they are huge! zip -r my-compressed-dir-without-psd.zip directory-to-zip -x '*.psd'

If you're using Sinatra and you want to use rake to run your test suite, you will need to create a Rakefile and put this in it. require 'rake/testtask' task :default do ENV['RACK_ENV'] = 'test' Rake::Task['test'].invoke end Rake::Test...

Here is a Regex for extracting URLs from text. However, these links will not already be hyperlinked or source attribtues from images or iframes. This example is in PHP. I was trying to format a Wordpress page to auto hyperlink but preserve embeded ima...