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I found http://www.rollapp.com (remote desktop) in recent days and it seems a good option for some educational apps at reasonable price. It is not without its issues (some app versions are dated)...

Does this help in understanding 32/64 bit addressing?

https://en.wikipedia.org/wiki/64-bit_computing

You can go to very top bar, far right dropdown arrow (where you Power Off) and select Settings.
Then Appearance.
Try Window Theme > dark to ease the eye strain.
There are other UI tweaks you can...

This is rather messy. I will throw in another idea to add to the advice above. I understand that you have deleted Windows and you are left with only Ubuntu. You have used Gparted before - although...

Just for extra information I now keep my two external SSD's in an external docking bay which is connected to Dell only through a USB3 connection (USB3 is necessary for performance). This allows me to...

Although you might have one solution if you are researching "100's of sites" then the tool for this is Zotero.
Two items are needed.
First a standalone app which is installed in your desktop. Mine...

Basically refind can be safely installed either in your internal drive or in the external SSD (which I prefer).
Looking at my setup I have /boot/efi/EFI in external SSD and inside there I have
>...

I too am on Dell (3268) with Windows 10 on internal drive and Ubuntu on external USB3 SSD.
I can only suggest trying to install ReFIND to give an alternative loader option in EFI folder. Works fine...

There is florence found in Synaptic Package Manager.

I don't use that search feature but does this explain?

I have never used emacs .. I use Atom and other tools such as Sublime Text 3.
But out of curiosity I explored how Atom and emacs might be configured in a cooperative toolchain.
These are the emacs...

I have had Tressorit bookmarked for some time pending future consideration.
But I have not applied it so far.
Still wary about implications of encrypted cloud as incremental backup.
I would...

Intuitively, for a small project I would look at airtable templates (I have not tried the template below).

https://airtable.com/templates/product-design-and-ux/exps29rjSzaWD5UD7/agile-workflow
...

All very solid advice from @TheFu which I have bookmarked and will apply.
But are there any points to look out for in my desktop 20.04 (running on external SSD1)
with a second external SSD2...

I have so many passwords in use (one per account) that I find it easier to use the "Forgot Password" feature which returns to my email account a link to inject a new password. Then I run pwgen in...

Stacer offers nice dashboards which show status of installed applications.

Since you are starting from a Windows 10 environment I suggest using Rufus (in Windows) to create the Ubuntu USB installer in a flash drive. All in UEFI mode.
Then you should be in a position to use...

It is not clear to me in first post whether your protocol error message displayed before you installed Krusader.
But you appear to have something tangible to search for .. i.e. your Krusader panels...

As an alternative to above, install Actiona from Synaptic.
In the Actiona GUI you can use the Window object to control different apps windows.
After testing in the GUI the script is run with the...

I recommend adding this GUI tool .. Stacer

There are dashboards for all three of your scenarios .. and more.

Then I would look at zenmap.
sudo -H zenmap .. scan localhost

There are many...

Open Firefox
Click on Open Menu ("hamburger" icon top right).
Select Addons
or you can just type "about:addons" in URL field
Select Extensions
Remove unwanted Extension


For more information...

I thought of trying rEFInd but yours is older MBR and rEFInd requires GPT to work..

Before jumping into the "Install Ubuntu" option FIRST use "Try Ubuntu" option.This allows you to see Ubuntu at work before any changes.

To create a zenity like GUI where you can add popup quiz questions you might like Actiona which is in repo.
Takes a bit of time to understand and since the Code widget uses Actionscript2 (extension...

My thought is that you could use some machine learning service (of book images) where book images are categorised into buckets.
You would need to "train" the algorithm with examples.