Ubuntu 22.03 Notes: Keyboard Shortcut to Switch between multiple moniters

 Super + P

Above combination in keyboard will do the work

Note: Super key in keyboard is (normally what we call as Windows button in keyboard)

Ubuntu 22.04 -Virtual Box Notes

 Uninstall Virtual Box 6.1 From Ubuntu

sudo apt-get remove --purge virtualbox-6*

Then run auto-clean command.

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Reinstalling Virtual Box 7.0 in Ubuntu

sudo vim /etc/apt/sources.list

Add this to the file

deb [arch=amd64 signed-by=/usr/share/keyrings/oracle-virtualbox-2016.gpg] https://download.virtualbox.org/virtualbox/debian jammy contrib

Add signature using command

wget -O- https://www.virtualbox.org/download/oracle_vbox_2016.asc | sudo gpg --dearmor --yes --output /usr/share/keyrings/oracle-virtualbox-2016.gpg

Install Virtual box 7.0 latest version using command

sudo apt-get update
sudo apt-get install virtualbox-7.0

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Download respective extension pack from link https://www.virtualbox.org/wiki/Downloads

Open VirtualBox->File->Tools->Extension Pack Manager

Remove Old extension pack  if there

Install->Browse current extension pack & Install

Ubuntu terminal command to switch to any drive

 cd /media/<user_name>/<drive_name>;

Change Ubuntu 22.04 LTS desktop background to pure black

 gsettings set org.gnome.desktop.background picture-uri "";

gsettings set org.gnome.desktop.background picture-uri-dark '';

gsettings reset org.gnome.desktop.background color-shading-type;

gsettings set org.gnome.desktop.background primary-color '#000000';

Notes: Install hplip in Ubuntu 22.04 along with plugin

 Commands are as follows:

sudo apt update && sudo apt upgrade -y;

sudo apt install software-properties-common apt-transport-https -y;

sudo add-apt-repository ppa:kelebek333/hplip -y;

sudo apt-get update;

sudo apt-get install hplip hplip-gui -y;

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Next you need to install respective plugins

Check the version of hplip using command: dpkg -l hplip

Then, download corresponding plugin file & .asc file that matches with version from link https://www.openprinting.org/download/printdriver/auxfiles/HP/plugins/

Then in terminal, type: hp-plugin

Then follow the GUI screen to install plugin.

Notes: Ubuntu-Libreoffice: Uninstall default Libreoffice provided with Ubuntu & install of your own

 Default Libreoffice that come with ubuntu don't have full version, like it don't have Libreoffice base. So one may need to uninstall default version & install full version of their own.

Terminal command to uninstall Libreoffice completely is as follows:

sudo apt-get update;sudo apt update

sudo apt-get -y remove --purge libreoffice* libexttextcat-data* && sudo apt-get -y autoremove

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Terminal command to install Libreoffice full version after that is as follows

sudo add-apt-repository ppa:libreoffice

sudo apt install libreoffice

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Verify installed version

libreoffice --version

Postgres-Ubuntu: Restore postgres database using pg_restore

 Command is as follows:

   pg_restore -U postgres -d <database name> -h localhost  <backup_filename>.dump