how to get internet access on the MATLAB linux image support for Raspberry Pi ?

I installed the custom linux image and i want to connect to my Rasberry Pi 3 using SSH which requires IP , username and password.I use a network cable. When i try to connect to the internet i get an error . Can someone help me setup internet access on my Pi ?

pi@raspberrypi-tVcjxlhiPk:~ $ sudo apt-get install realvnc-vnc-server realvnc-vnc-viewer
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Recommended packages:
  cupsys
The following NEW packages will be installed:
  realvnc-vnc-server realvnc-vnc-viewer
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 6,369 kB of archives.
After this operation, 34.2 MB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
  realvnc-vnc-server realvnc-vnc-viewer
Install these packages without verification? [y/N] y
Err http://archive.raspberrypi.org/debian/ jessie/main realvnc-vnc-server armhf 5.3.2.22607
  Could not resolve 'archive.raspberrypi.org'
Err http://archive.raspberrypi.org/debian/ jessie/main realvnc-vnc-viewer armhf 5.3.2.21015
  Could not resolve 'archive.raspberrypi.org'
E: Failed to fetch http://archive.raspberrypi.org/debian/pool/main/r/realvnc-vnc/realvnc-vnc-server_5.3.2.22607_armhf.deb
  Could not resolve 'archive.raspberrypi.org'

E: Failed to fetch http://archive.raspberrypi.org/debian/pool/main/r/realvnc-vnc/realvnc-vnc-viewer_5.3.2.21015_armhf.deb
  Could not resolve 'archive.raspberrypi.org'

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

Answer 1

[Alain Kuchta]

Based on this Answers post, the Linux image installed by the support package installer is the standard Raspbian Linux distribution, with additional packages. I recommend using the documentation for Raspberry Pi and related forums for help.

For example you might consider starting here: https://raspberrypi.stackexchange.com/questions/12919/how-to-debug-no-internet-connection