Creating the user ID and group

Create the required user ID and group ID before you install WebSphere® MQ. Both user ID and group ID must be set to mqm. For stand-alone machines, you can create the new user ID and group IDs locally; for machines administered in a network information services (NIS) domain, an administrator must create the IDs on the NIS master server machine.

It is also suggested that you set the mqm user's home directory to /var/mqm.