GNU social Tips
Granting/Revoking role of user
To grant or revoke role of an user, you can use
Granting role of administrator to an user of nick name
php scripts/userrole.php -n new_admin -r administrator -v
Revoking role of administrator to an user of nick name
php scripts/userrole.php -d -n old_admin -r administrator -v
An user with role of administrator will see 'Admin' section after login.
Other than administrator, there are also roles of owner, moderator, sandboxed, silenced and deleted. I don't know what will effect on users with those roles.