Root at Scientific Linux CERN SLC

Hello,
I’ve installed Scientific Linux CERN SLC.
I am not developed linux user.
Typing ‘‘root’’ on terminal message ‘‘command not found’’ appears.
Using ‘‘find’’ command root files are found in usr directory
which is not reachable on terminal.
I can see files just in home directory on terminal.
What should I do to run root?
Or is it not included instantly?

Thank Tou.

Build Prerequisites -> Installing ROOT from Source -> ROOT Version v5-34-00 Patch Release Notes
Downloading ROOT -> Production Version 5.34