I want to know what has changed in Ubuntu 22.04.1 vs 22.04.2, but I cannot find ANYTHING. There is only some "download link" for 22.04.5 .
What is the main website that has details about every release? (When they are released, how to see the changes, and how to update to them. Is it a normal apt-upgrade)?
I only found this link that is not my question.
If you scan the announcements of a later point release you'll find the following (eg. https://fridge.ubuntu.com/2024/02/22/ubuntu-22-04-4-lts-released/)
As usual, this point release includes many updates and updated installation media has been provided so that fewer updates will need to be downloaded after installation. These include security updates and corrections for other high-severity bugs, with a focus on maintaining stability and compatibility with Ubuntu 22.04 LTS.
ie. the point release has all the upgraded packages included, that get 're-spun' into a new ISO available for download, should you need to re-install.
For some systems, there can be a change in kernel stack, and a new installer provided, eg.
Lubuntu 22.04 LTS & 22.04.1 media used and installed with the GA kernel stack (5.15 kernel), however 22.04.2 and later media would use and install a HWE kernel stack; but that's the standard for Ubuntu flavor Desktop, as it was for Ubuntu Desktop 18.04 LTS & earlier too. Ubuntu Desktop (20.04 & later) & Ubuntu Server do not however have these kernel stack changes.
In essence, the point release is a reflection of security fixes and other package updates being applied.
The ISO available easiest, naturally contains all security fixes applied (ie. 22.04.4 currently), however if you look (https://old-releases.ubuntu.com/) you can find the older ISOs too, only you'll end up with the same result after install and security fixes/upgrades are fully applied.
The only real benefit (I see) of the older ISOs is for Quality Assurance and other testing, as post-install and upgrades it'll be identical to later media; but if used live (without install) you can contrast bugs using the current (updated or installed system) as against what was provided with an older stack (ie. without updates).
An older 22.04.2 media is useful to view a snapshot of what occurred at some historical point in time (release of the ISO) before later security fixes were applied. Thus why they're not easily found; they're not useful to most people (just requiring more security fixes to be applied post-install; when it kernel stack changes; those are easily changed post-install anyway)
If you want to view the BUGS fixed in the later point release, they're available too, eg. for Ubuntu 22.04.4 LTS (the same release I used earlier) you can view
ie. install any Ubuntu 22.04 LTS media & apply all security fixes and you'd get those updates, but those posts show what was included on 22.04.4 over the prior 22.04 media. Multiple only links due to the size allowed in discourse posts (there are costs with increasing post size; using multiple posts a cost-effective workaround)
