These examples are based on a Linux system. Switch to the mqm user.
su - mqm
The dmpmqmsg command is used to perform a number of tasking, including copying messages from queue "a" to queue "b". In this example, the messages on QUEUE01 are copied to QUEUE02. This assumes that the "mqm" users .bash_profile has been updated to have PATH=$PATH:<root installation directory>/bin.
dmpmqmsg -m MANAGER01 -i QUEUE01 -o QUEUE02
Once copied, you may want to use the amqsbcg command to display the messages in the queue, qstatus command to display the CURDEPTH (current depth) of the queue, and display queue to display the MAXDEPTH of the queue.
The dmpmqmsg command can also be used to move messages.