[sgc2c]

I've tried every installation guide I could find online and no luck at all.
Here's what happens:

• Did the instructions on https://develop.openfoam.com/Develop...install-script
• Got this during the apt-get install step:

# apt-get install openfoam2306-default
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package openfoam2306-default

So I went the certificates route and seemed well:

• apt-get install ca-certificates went fine.
• But apt-get update not so good. Here's what I got. What do I do?

# apt-get update
Hit:1 http://us.archive.ubuntu.com/ubuntu xenial InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease
Hit:3 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease
...
Hit:5 http://archive.canonical.com/ubuntu xenial InRelease
Hit:6 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu xenial InRelease
Hit:7 http://security.ubuntu.com/ubuntu xenial-security InRelease
Hit:8 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:9 http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu xenial InRelease
Ign:10 https://dl.openfoam.com/repos/deb xenial InRelease
Ign:11 https://dl.openfoam.com/repos/deb xenial Release
Ign:12 https://dl.openfoam.com/repos/deb xenial/main amd64 Packages
Ign:13 https://dl.openfoam.com/repos/deb xenial/main all Packages
Ign:14 https://dl.openfoam.com/repos/deb xenial/main Translation-en_US
Ign:15 https://dl.openfoam.com/repos/deb xenial/main Translation-en
Ign:16 https://dl.openfoam.com/repos/deb xenial/main amd64 DEP-11 Metadata
Ign:17 https://dl.openfoam.com/repos/deb xenial/main DEP-11 64x64 Icons
Ign:12 https://dl.openfoam.com/repos/deb xenial/main amd64 Packages
Ign:13 https://dl.openfoam.com/repos/deb xenial/main all Packages
Ign:14 https://dl.openfoam.com/repos/deb xenial/main Translation-en_US
Ign:15 https://dl.openfoam.com/repos/deb xenial/main Translation-en
Ign:16 https://dl.openfoam.com/repos/deb xenial/main amd64 DEP-11 Metadata
Ign:17 https://dl.openfoam.com/repos/deb xenial/main DEP-11 64x64 Icons
Ign:12 https://dl.openfoam.com/repos/deb xenial/main amd64 Packages
Ign:4 http://developer.download.nvidia.com...ntu1604/x86_64 InRelease
Ign:13 https://dl.openfoam.com/repos/deb xenial/main all Packages
Ign:14 https://dl.openfoam.com/repos/deb xenial/main Translation-en_US
Ign:15 https://dl.openfoam.com/repos/deb xenial/main Translation-en
Ign:16 https://dl.openfoam.com/repos/deb xenial/main amd64 DEP-11 Metadata
Ign:17 https://dl.openfoam.com/repos/deb xenial/main DEP-11 64x64 Icons
Ign:12 https://dl.openfoam.com/repos/deb xenial/main amd64 Packages
Ign:13 https://dl.openfoam.com/repos/deb xenial/main all Packages
Ign:14 https://dl.openfoam.com/repos/deb xenial/main Translation-en_US
Ign:15 https://dl.openfoam.com/repos/deb xenial/main Translation-en
Ign:16 https://dl.openfoam.com/repos/deb xenial/main amd64 DEP-11 Metadata
Ign:17 https://dl.openfoam.com/repos/deb xenial/main DEP-11 64x64 Icons
Ign:12 https://dl.openfoam.com/repos/deb xenial/main amd64 Packages
Ign:13 https://dl.openfoam.com/repos/deb xenial/main all Packages
Ign:14 https://dl.openfoam.com/repos/deb xenial/main Translation-en_US
Ign:15 https://dl.openfoam.com/repos/deb xenial/main Translation-en
Ign:16 https://dl.openfoam.com/repos/deb xenial/main amd64 DEP-11 Metadata
Ign:17 https://dl.openfoam.com/repos/deb xenial/main DEP-11 64x64 Icons
Ign:12 https://dl.openfoam.com/repos/deb xenial/main amd64 Packages
Ign:13 https://dl.openfoam.com/repos/deb xenial/main all Packages
Ign:14 https://dl.openfoam.com/repos/deb xenial/main Translation-en_US
Ign:15 https://dl.openfoam.com/repos/deb xenial/main Translation-en
Ign:16 https://dl.openfoam.com/repos/deb xenial/main amd64 DEP-11 Metadata
Ign:17 https://dl.openfoam.com/repos/deb xenial/main DEP-11 64x64 Icons
Err:12 https://dl.openfoam.com/repos/deb xenial/main amd64 Packages
404 Not Found
Ign:13 https://dl.openfoam.com/repos/deb xenial/main all Packages
Ign:14 https://dl.openfoam.com/repos/deb xenial/main Translation-en_US
Ign:15 https://dl.openfoam.com/repos/deb xenial/main Translation-en
Ign:16 https://dl.openfoam.com/repos/deb xenial/main amd64 DEP-11 Metadata
Ign:17 https://dl.openfoam.com/repos/deb xenial/main DEP-11 64x64 Icons
Fetched 1,581 B in 4s (381 B/s)
Reading package lists... Done
W: The repository 'https://dl.openfoam.com/repos/deb xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch https://dl.openfoam.com/repos/deb/di...amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.

[olesen]

Ubuntu 16.04 LTS is no longer supported.
Standard (ubuntu) maintenance ended in 2021.
Ubuntu 18.04 LTS maintenance ends in 2023.

[sgc2c]

Regardless of support, are there old binaries available, or somewhere to obtain a distribution that I could compile?
Upgrading the OS version from 16.04 will be difficult in the near-term.
Thank you.