If you start the setup on Unix directly with
java -jar ./jobscheduler_linux-xxx.jar
then the setup will open "xterm" to enter a root password.
Please call instead
./setup.sh
This script calls sudo to enter the root password.
For Unix no root privileges are required. If you want to install the JobScheduler without root privileges, then call
./setup.sh -u
Please use the JobScheduler Installation Manual (§1.2) for more information