How to smply install Astra SDK on Ubuntu?

I’ve downloaded the Ubuntu file from your website: Download SDK 2 – Orbbec

Unzipped the file and tried to run the file by navigating to the folder cd /home/username/astraSDK/install/

sudo su

chmod +x && sh

I get the following message
we suggest adding the folliowing line to your .bash_profile export ASTRA_SDK_INCLUDE=/home/username/AstraSDK/isntall/include

(1) Deone chmod +x

How to I run the program so that I can see what my Persee is filming and can start to bodytrack???