It is impossible to issue commands to the Intelligence Server when running as a service. Interactive mode runs a console loop that allows direct input from the end user
In order to find more information on how to run Intelligence Server on Linux in interactive mode please see KB16877:
https://community.strategy.com/article/KB16877-How-to-start-MicroStrategy-Intelligence-Server-9-x-in-an?t=1544688435032
./mstrctl -s

2. When Intelligent Server will stop please use this command:
./mstrsvr

3. In order to list the PU use this command:
D

4. You can save the results into a file
KB442406