Some wrong with install 20.04 LTS

[Colin Law]

On Sat, 8 Oct 2022 at 18:58, Jerry Geis <jerry.geis at gmail.com> wrote:
>
> I am trying to do apt-install build-essential
>
> and I get this
> 0 upgraded, 41 newly installed, 0 to remove and 0 not upgraded.
> Need to get 1100 kB/45.4 MB of archives.
> After this operation, 202 MB of additional disk space will be used.
> Do you want to continue? [Y/n] Ign:1 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 linux-libc-dev amd64 5.4.0-125.141
> Err:1 http://security.ubuntu.com/ubuntu focal-updates/main amd64 linux-libc-dev amd64 5.4.0-125.141
>   404  Not Found [IP: 91.189.91.38 80]

Before the install run
sudo apt update
sudo apt full-upgrade

to make sure everything is up to date.  If that goes ok but you still
can't install it then show us what is in /etc/apt/sources.list

Colin