The preferred way to install root is from source and with *cmake*. The installation from source might not be necessary but is necessary for example if extra libraries (such as GQt for the FACT++ GUI) are required.

Forst download the source tar-ball from ​http://root.cern.ch (The version in the following is just an example, names and places are just a suggestions)

[0] tar xvfz root_v6.14.04.source.tar.gz
[1] mv root-6.14.04 root-6.14.04-src
[2] mkdir root-6.14.04
[3] cd root-6.14.04
[4] cmake ../root-6.14.04-src
[5] make
[6] . bin/thisroot.sh