Installing Arduino on pc running MINT 10

I have downloaded the software for linux. I have unzippped it and saved it into a folder.

I then typed the following into the command line

su -c 'apt-get install arduino' root

I then typed arduino and got the following

The program 'arduino' is currently not installed. You can install it by typing:
sudo apt-get install arduino

I thought I had installed the programme. Can someone help please.

If you downloaded, and unzipped, the tarball from the arduino site that is all the installation needed. Just open the folder and run the arduino script. You will need to have a Java runtime installed. You will also, most likely, need to be a member of either the 'plugdev' or 'dialout' group or both to access the serial ports.

I checked for Java and got this

peter123@peter ~ $ java -version
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Java HotSpot(TM) Client VM (build 20.1-b02, mixed mode, sharing)

I dowloaded the tarball
arduino-1.0.5-linux32.tgz
and unzipped it

three script files were
ArduinoWifiShield_upgrade_mac.sh
ArduinoWifiShield_upgrade.sh
make.sh
which one is the script file to use??

It is the file named arduino, in the top level directory (arduino-1.0.5). It doesn't have the .sh extension.

i typed arduino after the prompt and got

The program 'arduino' is currently not installed. You can install it by typing:
sudo apt-get install arduino

So I changed the name of the file arduino to arduino.sh and ran that. I got

command not found

Please could you give me a few ideas to try. I thought I would look into the script within the arduino file to see if the commands were all valid. However, since it is from the download section of the ardino website I am thinking there can't be any errors in it !

thanks