Ubuntu 16.04.7 LTS: xenial-pgdg Release' does not have a Release file.

[Ralf Mardorf]

On Fri, 2022-09-23 at 14:36 +0100, Grizzly via ubuntu-users wrote:
> I cant remember how I got the code but once it was got
> 
>     sudo ua attach [the code for extended support]
> 
> To check status:
> 
>     sudo ua status
> 
> should show it all worked

Since Grizzly and I pointed to

"Extended Security Maintenance [...] ESM is available through an Ubuntu
Advantage for Infrastructure subscription for physical servers, virtual
machines, containers and desktops, and is free for personal use. [...]"
- https://ubuntu.com/security/esm

there likely is a solution for continuing maintaining your server
install.

I have to admit that my daily used desktop is running Arch Linux and
Ubuntu 16.04 is just a fallback for desktop usage. Actually a lot of
desktop apps might be more or less rendered useless on Ubuntu 16.04
nowadays, but probably server related software, especially if it's from
"main", might be still well supported.