You can run the CloudBees Flow upgrade in unattended (silent) mode with no user interface for either Windows or Linux.
|When upgrading the nodes in a CloudBees Flow cluster, you must keep the other nodes stopped until the primary node upgrade is complete.|
(Linux only) Enter the following command to make the installer file executable:
chmod +x ./CloudBees Flow-<version>
Enter the following command from a command line to begin a silent upgrade:
./CloudBees Flow-<version> --mode silent