Network Manager problem

Hello,
please I need help ,
I Follow this tutorial ftp://ftp.intel.com/Pub/fpgaup/pub/I...ies_Boards.pdf
I downloaded the linux distrubtion I try to connect my board to the Internet using Wifi adapter
but here I found this problem when I try to launch this script as show in the tutorial
./connect_wpa <SSID> < password>
I see this error in the terminal
stop: Unknown job: network-manager

Any one can help please