Embellished a few lines of instruction for Ubuntu users.
Embellished a few lines of instruction for Ubuntu users.

Signed-off-by: Barbara Harmon <eec8646bec871d13e9e24e82c315e7b2f0fdcf9e@jaguarlandrover.com>

dvthiriez/rvi_backend,dvthiriez/rvi_backend,dvthiriez/rvi_backend,dvthiriez/rvi_backend