sudo apt install gnupg software-properties-common
sudo wget -O /etc/apt/keyrings/qgis-archive-keyring.gpg https://download.qgis.org/downloads/qgis-archive-keyring.gpg
Add the following to /etc/apt/sources.list.d/qgis.sources (requires sudo)
Types: deb deb-src
URIs: https://qgis.org/debian
Suites: jammy # or your-distro's-codename
Architectures: amd64
Components: main
Signed-By: /etc/apt/keyrings/qgis-archive-keyring.gpg
sudo apt update
sudo apt install qgis qgis-plugin-grass
Type world into the "Coordinate" box at the bottom and hit Enter to get a map of the world.
Hit Ctrl + Shift + F to zoom out to the full extent.
"EPSG4326" in lower right is the projection of the map.
- many options are available
- Klas Karlsson, QGIS 3 for Absolute Beginners, Apr. 1, 2019.
- QGIS, QGIS Installers - Linux - Debian/Ubuntu