5.2 Using Unix Accounts

In the GNU/Linux environment, the authentication subsystem may be attached to standard accounts defined by passwd/shadow files by enabling configuration option auth.allowsystem. To put a user into a specific role, following system group must be present and corresponding user account must a member of that group:

In the GNU/Linux environment, a root system account may also be bound to the admin user of the REX Control system by enabling configuration option auth.allowroot.

Example: To bound a "pi" system account with the "admin" role of the REX Control System in the Raspberry Pi device, just create a system group "rex-admin" and add the user "pi" as a member with a shell command "usermod -a -G rex-admin pi". It is then possible to login into the REX Control system using the user name "pi". The password may be changed with a shell command "passwd".