Verify that no cronjobs are running prior an upgrade¶

A cronjob running during an upgrade can interfere with the upgrade process. Even if the crontab is disabled, it is possible that a long-running cronjob is still on-going. In that case, this long-running cronjob can interfere with the upgrade process, which can lead to upgrade issues.

That is why it is recommended to check for running cronjobs prior an upgrade, with the hereafter commands.