The new version of the Raspberry Pi imager is out now. This release adds improved support for Fedora Linux and a workaround for sandboxed Linux environments. In addition, the program has small improvements to the Advanced options panel, updated translations, and more. After installing the latest version, you can try running sudo apt install rpi-imager. The installer is available at the Raspberry Foundation's download page.
After downloading the operating system image, you can run Raspberry Pi Imager. The program will open the file picker and choose the image you want to use. It will erase any data on the microSD card and then flash the new operating system. The process takes a few minutes, so be patient. If the application does not start automatically, you may need to reinstall the OS. Afterward, you can remove the new operating system by rebooting the device.
The latest version of Raspberry Pi Imager enables users to burn their own operating system. This utility is free and can be downloaded from the project's GitHub page. You can also install it by using the official Raspbian repositories. If you don't want to download it yourself, you can download it from the official site. You'll need a running Raspbian installation to perform the installation. If you've never tried installing an operating system, you'll need to do so before trying to install the operating system.