You can run the CloudBees CD/RO upgrade in unattended (silent) mode with no user interface for either Windows or Linux.
When upgrading the nodes in a CloudBees CD/RO cluster, you must keep the other nodes stopped until the primary node upgrade is complete.
Also, after upgrading from CloudBees CD/RO 10.8 or earlier, delete all
(Linux only) Enter the following command to make the installer file executable:
chmod +x ./CloudBeesFlow-<version>
Enter the following command from a command line to begin a silent upgrade:
./CloudBeesFlow-<version> --mode silent