Version 2.8.2 Install - No 'Build Essential'

After a succesfull install of 2.8 and update to 2.8.2, I require to compile a file, but 'Build Essential' is missing!
After typing my usual:
sudo apt-get install build-essential
I get 'E: Unable to locate package build-essential'

So I type:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install build-essential

But still I get    'E: Unable to locate package build-essential'

Any suggestions ?
 

I guess your sources.list is not complete.
show your version and sources.list.  
 

Thank you.
Sorted

working now. Missing sources in sources list

Hi all

I have the same issue.

I am running Debian 10 BUster and my source.list is at follows:

deb-src cdrom:[Debian GNU/Linux 10 _Buster_ - Official Snapshot amd64 LIVE/INSTALL Binary 20201002-19:09]/ buster contrib main non-free

deb security.debian.org/debian-security/ buster/updates main contrib non-free
deb-src security.debian.org/debian-security/ buster/updates main contrib non-free

deb deb.debian.org/debian/ buster-updates non-free contrib main
deb-src deb.debian.org/debian/ buster-updates non-free contrib main

I have not so much experience on this OS, so I don't know is it something missing.
 

sudo apt-get install build-essential

Thank you for your answer

Once I type the command  the response is  "Unable to locate package build-essential'"

I tried to follow the steps but it seems there is something missing. Commands like  Make, lspci...etc do not work.

My issue is about installing a pci parallel board. I was not able to follow the manufacturer's instructions for installing drivers ( i need to use  "make" for that). So I decided to downgrade de LinuxCNC version from 2.8 to 2.7, run lspci command to know the ports used and then, modify the .hal file.

Now the machine is working