<ul><li>To upgrade a SUSE system, preparation is key and can be simplified using YaST.</li><li>Cleanup unused modules and add-ons before migration to avoid activation issues.</li><li>Activation and preparing SLES subscription can be done via YaST or shell commands.</li><li>Use SUSEConnect commands to register and activate necessary modules for the base system.</li><li>In case of connectivity issues, check SUSEConnect file and add proxy settings.</li><li>Online migration involves upgrading from one SLES version to another, ensuring compatibility.</li><li>Use 'zypper migration' command or YaST for online migration, updating repositories and applying patches.</li><li>For offline migration, boot the server using the desired SLES ISO version and follow the step-by-step upgrade process.</li><li>Check and adjust repositories during the upgrade, ensuring all necessary products are included.</li><li>Finalize the process by reviewing the summary and confirming the correct settings before system reboot.</li></ul>

Updating SUSE/ SLES the right way

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