A little cheat sheet for myself. All commands can be used via SSH or Shell:

Show Config: show run
Show Inventory: show inventory (Does show i.e. how many CPUs and RAM is installed. This does match normally to the Version of Cisco Prime. i.E. 8 vCPUs and 16 GB RAM -> Express Plus Type)

Show status of prime: ncs status

Backup OS and Application: backup PI311 repository defaultRepo
Backup Application only: backup PI311appOnly repository defaultRepo application NCS

Activate OS Shell: shell

Locations of different files
defaultRepo: /localdisk/defaultRepo
Config: /storedconfig
License Files: /opt/CSCOlumos/licenses

To transfer the backup files to a safe place, just use scp :).