iPhone Tethering on Ubuntu 9.10 (Karmic)

This tutorial is written for those who are not familiar with Ubuntu/Linux and is very detailed. If you are experienced feel free to just grab what you need from it.If you’re like me you have an iPhone and a portable computer running Ubuntu and you would like to have mobile internet without paying for an extra data plan from your carrier. Thanks to a few devoted individuals tethering the iPhone to Ubuntu is simple. The only prerequisite is that you must have an iPhone 3G or 3GS running OS 3.0 or higher. If you’re running 3.0 then you can do this without jail breaking your phone by installing a modified carrier profile. However, if you’re on OS 3.1+ then you will need to jail break your phone to install the modified carrier profile.