Switch to the mqm user.

su - mqm

This assumes that the "mqm" users .bash_profile has been updated to have PATH=$PATH:<root installation directory>/bin.

Setup John Doe to be able to setup a connection on CHANNEL01.

echo "alter channel(CHANNEL01) chltype(SVRCONN) mcauser('JohnDoe')" | runmqsc MANAGER01

Then, grant JohnDoe the "connect" and "inq" permissions on MANAGER01 and the "all" permission on QUEUE01.