Missing package from an old Ubuntu version (16.04 LTS)

[sindhurabandi]

Ubuntu Version:

VERSION=“16.04.1 LTS (Xenial Xerus)”

Desktop Environment (if applicable):

Not Applicable

Problem Description:

I know that 16.04 LTS is too old and its reached EOL long back. But we have a legacy product running this version (that we can’t upgrade). My question is, the package “linux-headers-4.4.0-47-generic” is not available on this version anymore.

root@a7f6349ae065:/# apt search linux-headers-4.4.0 | grep generic
linux-headers-4.4.0-142-generic/xenial-updates,xenial-security 4.4.0-142.168 amd64
linux-headers-4.4.0-186-generic/xenial-updates,xenial-security 4.4.0-186.216 amd64
linux-headers-4.4.0-21-generic/xenial 4.4.0-21.37 amd64
linux-headers-4.4.0-210-generic/xenial-updates,xenial-security 4.4.0-210.242 amd64

Any reason why it was removed? This was working until recently. So we were wondering what happened and why this particular version was removed? “4.4.0-21” version is still available, then why remove “4.4.0.47”?

Relevant System Information:

~# cat /etc/os-release
NAME=“Ubuntu”
VERSION=“16.04.1 LTS (Xenial Xerus)”
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME=“Ubuntu 16.04.1 LTS”
VERSION_ID=“16.04”
HOME_URL=“http://www.ubuntu.com/”
SUPPORT_URL=“http://help.ubuntu.com/”
BUG_REPORT_URL=“Bugs : Ubuntu”
UBUNTU_CODENAME=xenial

Screenshots or Error Messages:

What I’ve Tried:

Our build was failing, so I copied the package (and its dependencies) from an old build, and the build worked.

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[guiverc]

Did you read the Support and Help Start Here page?

It highlights standard-supported versions of Ubuntu and/or Ubuntu flavors.

Ubuntu 16.04 LTS reached EOSS long ago

Canonical still provide ESM support options, but this is not an appropriate site for ESM support; so if you have an ESM support contract, I suggest using your appropriate method of support.

This is for Ubuntu community support, which covers releases of Ubuntu in standard support only.