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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...

Yes, Firefox can open an image file, but what then? You need links to get to the internet. You would have to resort to bookmarks. I recommend a consolidated start page with images and links on the...

My Start Page is a local file - it's contents are entirely up to me. You might want to try that. You have to know basic HTML to make one, but just displaying an image (perhaps stored on your...

You are forgetting the systemd journal. Depending on how long your OS has been installed, you can sometimes find disk space used by the journal has grown to several gigabytes!

Here's an example: I...

If you know the basics of Flatpak installation, another option would be to install the Flatpak version (which is 1.3.3). No PPAs involved.


[dmn@Tyana ~]$ flatpak search handbrake
Name ...

You need to extend the root LV. Note you have 238480 free extents in the VG. (250 extents ≅ 1 GB)

Free PE / Size 238480 / 931.56 GiB

Also, you still are spanning 2 disks with the VG as...

vgextend sg30 /dev/sdb in post 11 should operate on the physical volume (pv) you are adding, not a disk - should be:

sudo vgextend sg30 /dev/sdb1

Edit:
I would try to remove the spurious PVs...

Two defined PVs of sd30 have no named block device. They are in the warning message of post 5. Try using the -a option with vgreduce to see if they go away. Then proceed with the outlined steps...

It's not a good idea to have a single volume group span two physical disks, because failure of either can result in loss of access to the entire vg. So we transfer all the data to sdb1 and remove...

Last two are in the Ubuntu repositories. Midnight Commander as mc. If they do not appear individually in the 'show applications' grid, they may be in the Utilities app folder. See the screenshot.