How to upgrade OpenSUSE 15.3 to 15.4 using the CLI

To upgrade OpenSUSE 15.3 to 15.4 using the command line, you can use the following steps:

1. Open a terminal and run the following command to update the package lists:

sudo zypper refresh

2. Run the following command to upgrade all installed packages to the latest version:

sudo zypper update

3. Run the following command to upgrade OpenSUSE 15.3 to 15.4:

sudo zypper dup

This will start the upgrade process to OpenSUSE 15.4. Follow the prompts to complete the upgrade.

Note that upgrading to a newer version of OpenSUSE can be a complex process and may require additional steps, depending on your system configuration. It's recommended to back up your data and consult the documentation for the new version of OpenSUSE before upgrading.