Message Queue in Linux

Hello

How can I see the created message queues in the system?

On my CentOS (Redhat) email queue is in:

/var/spool/mqueue

But emails do not stay in there very long if its working correctly.

Actually, I need the information of POSIX Message Queue, not the email queue.

ipcs and ipcrm, part of utils-linux(-ng)

yes, ipcs show the system v message queues but not the posix message queues.

if you mount the mqueue to the filesystem, you can see.
mkdir /dev/mqueue
mount -t mqueue none /dev/mqueue