Make a temporary directory and change to it. Then all the following commands apply.
Use the commands in bold
svn checkout svn://svn.berlios.de/arduino/trunkAnd the svn software took a good long time to get me the whole trunk. Once it's done you can continue.
You'll now have a directory called trunk created in your current directory.
cd trunkthe enter the build directory
cd buildthen enter the directory for linux
cd linuxNow you can do an ls and list the commands there. Which are:
dist.sh make.sh run.sh
Just run make.sh
./make.shYou should see "Building the PDE..." near the end.
Now run
./dist.shYou should see "Done.
Creating linux distribution for revision 0009...
Creating tarball and finishing..."
Now there is a file in your current directory called arduino-0009.tgz
use that as you would the -0007 or -0008 releases.
Any number or reasons can cause that to bomb. I have a Fedora Core 6 system with all the development tools installed.

Linux version almost ready?