Here's a nice collection of Ruby one-liners. Having a few of these formulas at hand, may save you lots of work...

Creating a remote git repo

Assuming you have a project in your local machine and console access to a remote server (and git installed on both), these instructions will accomplish the following:

1. turn your local copy into a git repository
2. push it to the remote server

Examples of tar usage

Fastest way I know to get help on the tar utility, in this post.

Root user in mac os

The unix-style root user is disabled by default in mac os X.
Should you need to activate it, follow these instructions.

Finding out where a ruby method is defined

To find out the source file/line of a ruby method definition, do something like the following:

Post.all.method(:all).source_location
Post.first.method(:save).source_location

Here's the source of this tip.

Unencrypting home directory in Ubuntu

In an Ubuntu install, I once requested home folder encryption. Bad idea.

To revert to regular file management I followed these instructions, which involved commenting out a line in each of the /etc/pam.d/common* files.

During a subsequent aptitude safe-upgrade, those lines were restored, not sure why.

I have again commented them out.

UTF-8-related warning from rack

After a recent bundle update (early June 2011), the following warning shows up while running specs:

GEM_PATH/rack-1.2.3/lib/rack/utils.rb:16: warning: regexp match /.../n against to UTF-8 string

This post addresses the problem, although it's strange that the problem in my case appeared just now.