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The simplest way is to use the terminal:

sudo apt install gnome-software
If you need or want Flatpak package support, you also need to get gnome-software-plugin-flatpak. It may or may not be...

If you have problems with Ubuntu Software (a snap package), install Gnome Software (a normal package). Gnome Software (icon is 'Software') has the added ability of searching for Flatpak packages*,...

gimp needs gimp-data to work (it called a dependency), so apt won't allow you to remove gimp-data without also removing gimp.

michael@michael-HP-EliteDesk-800-G1-SFF:~$ apt list --installed
gimp-data/focal,focal,now 2.10.18-1 all [installed,automatic]

apt is only a package manager for .deb packages, so doesn't show any...

If the Flatpaks works like the Snaps, you stay in the same branch* that you installed from - in your case, the beta repo, I think. Snaps however will automatically change to the stable channel when...

OK, that proves you have a 32-bit kernel. The bad news is that it can't run 64-bit software, which is what your .deb file installs. The "add-architecture amd64" command won't add any capability. You...

Find out with:

dmn@Tyana:~$ dpkg --print-architecture
amd64

What does it show?

It depends how the beta was packaged. If you used the Flatpak development repository on Flathub that Gimp suggests on the download page, then it will update automatically if you have Gnome Software...

That particular upgrade from Lubuntu 18.04 to a later version wasn't recommended by the developers due to large changes in the environment from LXDE to LXQt. I believe it was first mentioned in the...

Ubuntu Software does not include all software. Use Synaptic Package manager and you can install them*, or use apt in the terminal.

*except tixati - try the program's website for a .deb file.

Easy. A VG will only span two or more drives when you define it to include PVs on two or more drives. It's all specified in the vgcreate and vgextend command options.

sudo pvmove /dev/sdb1
will move data on this PV to elsewhere in the CL volume group (if there is enough available space).
Once this is done, you can then remove sdb1 from CL with pvremove. Then...

I have a Zotac ID18 - (if model number had 'I' its Intel, if 'A' is AMD.) which was bought in 2014. Its the original style Zotac case. You can google the specs, but its UEFI, with Celeron pricessor...

You don't need to do this any longer. 32-bit support is already enabled. You can verify supported architectures with these commands:
Check the native architecture:

dmn@Sydney:~$ dpkg...

You are looking at a page for the Kindle app, not the Kindle Cloud Reader. It's not for Linux. Cloud Reader works for any OS that can use Firefox or Chromium Browser.

You don't download or install...

Use the Kindle Cloud Reader in your browser - Firefox or Chromium. You log in and can access all the books you have purchased, but they are stored on Amazon server - not stored on your computer.
...

To bookmark folders in Ubuntu 20.04, right-click on them in the path in Files and the bookmark option becomes available. See the screenshot attached.

When you resize the logical volume ubuntu-lv with the lvextend command, you need to use the --resizefs option to make the file system fill the bigger LV space.

If you didn't use that option, then...

You start with a GPT partitioned disk and two partitions made with gparted, the EFI system partition and a second one for your LVM. See the attached screenshot, and the display below. gparted can...

Your separate root and home are created in separate logical volumes instead of separate partitions.

Create the LVM setup you need before starting the installer by using the terminal, since the...

Check the size of the systemd journal:

dmn@Tyana:~$ journalctl --disk-usage
Archived and active journals take up 2.1G in the file system.

Reduce it if it is growing too big. Here is is reduced...

The location is good. Check the .desktop file entries. In particular, if the path in the Exec= line in the .desktop file isn't correct, the program won't show in the overview search or in the...

Some Windows programs are packaged as Snaps. These are the only ones that can use the packages you displayed.
Such as:
Notepad:
https://snapcraft.io/install/notepad3/ubuntu
When you install it,...

If you must have the latest, you can install the Flatpak for Thunderbird:

dmn@Tyana-vm:~$ flatpak search thunderbird
Name Description ...

As to the OPs question:

Use Google Image search. Search term "computer wallpaper". You can specify scenic, abstract, patterns, dinosaurs, kittens, etc. along with that if you like. There will be...