Refer: http://manpages.ubuntu.com/manpages/bionic/man1/diceware.1.html
Sample Usage
Four words, and separate by dash
$ diceware -n 4 -d -
Installation
$ sudo apt-get update -y
$ sudo apt-get install -y diceware
Install gTile and/or Gnome Extensions
Installing Gnome Extensions - Wanted for gTile
Usage Refer: https://github.com/gTile/gTile
Refer: https://linuxconfig.org/how-to-install-gnome-shell-extensions-on-ubuntu-20-04-focal-fossa-linux-desktop
$ sudo apt install gnome-shell-extensions
Logoff and Logon Again
Install Firefox extension: https://extensions.gnome.org/
Click on the gnome extension icond in Firefox
Search for gTile and install it
Install Discover
This seems like a better curated Ubuntu software repository which also tells you what needs to be updated.
$ sudo apt install plasma-discover
Allow MP4 to Play in Ubuntu 20.04
Refer: https://linuxconfig.org/unable-to-play-the-file-missing-decoder-on-ubuntu-20-04-lts-focal-fossa
Error Message when trying to play MP4:
Video mp4 dvd subpicture decoder is required to play the file but is not installed
sudo apt install -y vlc
sudo apt install ubuntu-restricted-extras
sudo apt install libdvdnav4 libdvd-pkg gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly
sudo reboot
Older notes: Don't think these fixed anything; however, you do need to install VLC standard
Refer: https://itsfoss.com/play-dvd-ubuntu-1310/
These commands don't really do the trick:
sudo add-apt-repository multiverse
sudo apt install -y libdvd-pkg
sudo dpkg-reconfigure libdvd-pkg
Important: You need to install VLC from command line and NOT Snap version
sudo apt install -y vlc
Ubuntu update error “waiting for unattended-upgr to exit”
Refer: https://techtips.easycloudsolutions.com/2018/05/15/ubuntu-update-error-waiting-for-unattended-upgr-to-exit/
Stop the automatic updater.
$ sudo dpkg-reconfigure -plow unattended-upgrades
At the first prompt, choose not to download and install updates.
Make a reboot. Make sure any packages in an unclean state are installed correctly.
$ sudo dpkg --configure -a
Get your system up-top-date.
$ sudo apt update && sudo apt -f install && sudo apt full-upgrade
Turn the automatic updater back on, now that the blockage is cleared.
$ sudo dpkg-reconfigure -plow unattended-upgrades
Select the package unattended-upgrades again.
Wormhole File Transfer to Send and Receive files
Wormhole Usage
Refer: https://www.omgubuntu.co.uk/2017/06/wormhole-fast-secure-way-send-files-users-cli
Installation
sudo apt-get install magic-wormholeUsage
wormhole send filename or "folder name"
wormhole receive special-codeCompare Two PDF in Ubuntu with diffpdf
Visual Compare
Usage diffpdf -a filename1.pdf filename2.pdf
Text Compare
Usage: diffpdf filename1.pdf filename2.pdf
Refer: http://manpages.ubuntu.com/manpages/xenial/man1/diffpdf.1.html
MenuLibre Fails to Launch
Refer: https://askubuntu.com/questions/450382/xubuntu-menulibre-application-menu-editor-not-launching
Fix as follows, because of corrupted menus
mv ~/.config/menus/ ~/.config/menus.bakDisable unattended upgrades from being launched
Symptom: Unable to launch software updapter because of unattended upgrade
Refer: https://unix.stackexchange.com/questions/470709/how-do-i-stop-disable-unattended-upgrades-from-being-launched-automatically
Launch the following, and then choose "No":
sudo dpkg-reconfigure -plow unattended-upgrades
Lubuntu 20.04 Writer Spell Checker NOT Working
Refer: https://askubuntu.com/questions/1150144/spell-checker-not-working-in-libre-office-6-0
File: dict-en-20200601.7z
This worked for me. Even hunspell or myspell, as suggested by resplin, didn't work.
However adding this extension to Libre Office worked like charm: https://extensions.libreoffice.org/extensions/english-dictionaries/
You'll need to go to Tools > Extension Manager > Add > {upload extension file}. Restart.