Downloading

If you don't have ROOT yet, download it! We have binaries but you can also build it yourself.

Environment Variables

ROOT expects ROOTSYS, PATH and LD_LIBRARY_PATH to be set correctly. If which root does not show anything then use the script that does all of that:

source wherever/root/is/bin/thisroot.sh

Starting ROOT

Now you can start ROOT using root or root -l to suppress the logo. See root --help for more options.