My PyQt GUI book Create Simple GUI Applications has been updated, with new chapters on Qt Designer and multithreading. Get it here.

Set CDPATH to ease folder navigation

CDPATH is an environment variable which tells the cd command where to look for the specified folder. By including the parent folders of commonly used locations you can access folders more easily - and without typing an entire path.

Use to return your IP and Host is a web service that displays information about your connection, including IP address, hostname and User Agent string. Helpfully it provides a simplified interface that can be easily queried to get this information from the command line.

Install HomeBrew package manager for Mac

Homebrew is the easiest and most flexible way to install the UNIX tools Apple didn't include with OS X. It provides a simpler alternative to MacPorts, installing under an isolated non-root prefix, symlinked to /usr/local

Use screen to manage persistent sessions

GNU Screen is a command-line application that allows use of multiple virtual sessions within a single real terminal or remote session. Importantly, it allows for persistent running of command-line applications independent of the shell that initiated them program, meaning active applications can persist during disconnection.

KDE fileprotocol+transportprotocol://

While getting started using the new SVN I was looking for a quick way to download the contents of an SVN to local disk. This can be useful when doing research on methods employed by other plugins or for getting a local development copy where SVN access is unavailable. Under KDE you can normally access any remote location using the standard URL format. For example, an SVN (using the svn://) protocol would normally be accessed using the URL style svn://

Apache vs. the Slashdot Effect

Increasing traffic is the measure of success for a website. More visitors equals more exposure which in turns generates more income. However, if you have hosted your site on a low-end package you could get hit by excess use charges just as your start celebrating your success.