The vtprocgrp is automatically created when the VTL software is installed, and contains the root user.
You may want to add non-root users to the vtprocgrp if you have any monitoring daemons running as a non-root user, such as Nagios NRPE, in your environment. This will enable the monitoring daemons to run command line programs to access Commvault VTL 2.0 and report back status.
Use the following command to add non-root users to the vtprocgrp:
# sudo usermod -a -G vtprocgrp <add_user>