There is a new card about how to do this with the new AWS Command Line Interface
If Rails or Rake are complaining about a missing gem that is listed in your Gemfile.lock and the listed version...
You can use this shell command: uniq -u input.txt output.txt
This will reduce the filesize of foo and bar to 0 bytes: truncate -s0 foo bar If the files do...
When you run rake db:create and get this error message Couldn't create database for {"encoding"=>"utf8", "username"=>"root...
Most likely you run rake and your code is causing an exception which is not the one shown in your...
whatsmydns.net is an online service that allows you to instantly perform a DNS lookup to check a hostnames current IP...
When you put a Rake task into lib/tasks, but running it fails with... Don't know how to build task...
cURL makes a web request and shows you the response body. You can redirect the response body to /dev/null just...
Consider you have a website vhost listening to www.example.com, redirecting all incoming requests that do not talk about the configured...
We forked craken today and fixed one of the issues we had with new (>0.8.7) rake versions. The craken:install...
Here is a way to create a duplicate of one database, with all its tables and their data, under a...
If you using gpg for your encrypted backup and it fails after you put it in crontab make sure you...
You can use fold: fold -sw 60 You can now paste your texts. fold will echo them back, word-wrapped...
When you drag a file from a Nautilus window into a terminal window, the file's path will be pasted...
The state_machine gem comes with a rake task that lets you generate PNG graphs from any model using state...
If you get an error "Adress already in use" with autossh check with lsof or netstat if something already listen...
Whenever Firefox updates, all your Cucumber features that use Selenium break. This is annoying. In order to remedy this, version...
If you have different users for different servers, don't use set :user. Encode the username into the server definition...
Microsoft provides virtual machine disk images to facilitate website testing in multiple versions of IE, regardless of the host operating...
Great blog with daily news and HOWTOs for Ubuntu, Linux and Gnome.
DeaDBeeF is one of the better music players for Linux. You can find installation instructions here.
Note that converting from RGB to CMYK will usually degrade your colors because no exact mapping is possible. Anyway, this...
Use the PDF toolkit: sudo apt-get install pdftk To rotate page 1 by 90 degrees clockwise: pdftk in.pdf cat...