Ubuntu installation history

Hi,

I just ran the upgrade process and was alarmed to see I had not upgraded to 21:10 which is what I thought I was doing, it says 21.10 is available saying I am on 21:04, this would imply before I ran the upgrade I was therefore using 20:10. Its been a while since I installed linux but I didn't think it had been that long. Is there a way to see what versions had been installed already on here? Or see files that were installed upon first use of the computer to see the date of those? I guess a lot may have been over-written by the upgrade today anyway. Thanks in advance.

Your apt history is in /var/log/apt/history* files.

Thank you, this folder has .gz files and in the earliest one it has history to 9th feb 2021, so this infers I had october 2020 installed. Interesting. Thanks, will have to try another update tomorrow then.

Installation media name and type is usually shown in the first line of /etc/apt/sources.list. For example on my 18.04 LTS machine I have

$ head -n1 /etc/apt/sources.list
# deb cdrom:[Ubuntu 12.04.4 LTS _Precise Pangolin_ - Release amd64 (20140204)]/ dists/precise/main/binary-i386/

So it was upgraded from 12.04 LTS → 14.04 LTS → 16.04 LTS → 18.04 LTS (now).

Other interesting folders are /var/log/installer/ and /var/log/dist-upgrade/ . The first contains first installation logs with date (for me it is 8 Feb 2014), the second - logs of all distribution upgrades.

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OK well its upgraded now, I look forward to seeing if the upgrade has fixed my strange sound echoing issue.

OK so since this upgrade I've noticed opening up FireFox is very slow compared to before, any ideas?

Since upgrading and opening up TOR browser I now find I cannot save files to wherever I like on the system with it saying permision denied to access the drive, why has this now happened?

Since the upgrade the Ubuntu system had MATE installed, I just uninstalled TOR and reinstalled it to see if that would make a difference but it didn't. I then thought to uninstall MATE in case that was the issue however even when I go to select the main package it leaves other MATE items installed, how do I remove MATE completely? Curiously TOR can save to its own download folder. Thanks in advance..

Edit I just saw this on a post on Reddit but it is simply not true, I could save files anywhere before:

" Access denied means you're trying to save somewhere other than the 'Tor Browser' folder. The browser can only read and write to that folder as a security measure. Move the file manually where you want it after saving."