Security of objects on UNIX and Linux
Administration users must be part of the mqm group on the system (including root) if this ID is going to use IBM MQ administration commands.
We should always run amqcrsta as the "mqm" user ID.
User IDs on UNIX and Linux
The queue manager converts all uppercase or mixed case user identifiers into lowercase. The queue manager then inserts the user identifiers into the context part of a message, or checks their authorization. Authorizations are therefore based only on lowercase identifiers.
Parent topic: Security for remote messaging