Network Manager problem

[Altera_Forum]

Hello, 

please I need help , I Follow this tutorial ftp://ftp.intel.com/pub/fpgaup/pub/intel_material/17.0/tutorials/linux_on_de_series_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