I can only seem to find instructions on how to install the Arduino IDE in Ubuntu 10.10, but nothing on how to install it in Ubuntu 12.10. I've actually only just installed Ubuntu 12.10 and I'm trying to figure out how it all works as I've only ever used windows before, so I wanted to find an easy to follow guide for idiots so I know what to do. Can anyone help?
sudo apt-get install arduino works fine
in case you prefer installing it using a GUI
go to the software centre and search for Arduino IDE. Click Install and you are done.
I had trouble with the repository version from Ubuntu. I highly recommend downloading the Arduino site version and unpack it in a local directory. Then run the arduino shell script in that directory. I have IDE v1.0.1, v1.0.2, and v1.0.3 on mine now. They all work fine, depending on the shell script I run.