I've solved in this way:
- I have downloaded the package "Pentaho PDI" on the server.
- I have created the folder "scheduled_jobs".
- I have exported, from the Pentaho PDI on my computer , the job I want to schedule using the command: Export->Export all linked resources
- I have copied the files of this zip (jobs and trasactions) into the folder "esami" into "scheduled_jobs".
- I have executed this command: pentaho@pentaho:~/scheduled_jobs$ /home/pentaho/data-integration/kitchen.sh -file="/home/pentaho/scheduled_jobs/esami/J_load_esami_datamart.kjb" -logfile="/home/pentaho/logs/schedules.log"
It works, so now I can schedule this command in a cron job.
Claudio