Security of objects on UNIX and Linux

Administration users must be part of the mqm group on your system (including root) if this ID is going to use IBM MQ administration commands.

You 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.