Are ITMS Agents Supported on Raspberry Pi OS and Raspbian devices?
Release : 8.5 & 8.6
Raspberry devices are not currently supported as these devices have not been thoroughly tested. For a complete listing of supported devices see:
181899 Support Matrix of Symantec Management Platform and Altiris Solutions
Other work arounds have been know to work when installing the agent on Debian based system
This documentation may help you install the agent and subagents for Linux:
164613 How to collect Software Inventory from Debian based operating systems?