Install KTorrent with WebGUI on Ubuntu

1. ktorrent needs php executable path to show web interface so you have to install php command-line interpreter as well

sudo apt-get install php5-cli ktorrent

2. go to Settings / Plugins to load Web Interface plugin first

3. switch to WebInterface Options. if php executable path field shows "Php executable isn't in default path, please enter the path manually" or the light color is red, just set the path to /usr/bin/php then it'll turn green.