Which namespace is responsible for inter-process communication in Linux containers?

The ipc namespace is specifically designed to manage inter-process communication resources in Linux containers. By isolating the processes in a container, the ipc namespace ensures that the processes can communicate with each other through IPC mechanisms such as message queues, shared memory, and semaphores without interfering with processes in other containers or the host system. This is crucial for maintaining the integrity and security of inter-process communication, as it prevents one container from accidentally or maliciously accessing the IPC resources of another container, thus enabling each container to operate independently and securely.

The other namespaces serve different purposes: the uts namespace handles hostname and NIS domain name isolation, the user namespace provides user and group ID isolation, and the net namespace is concerned with network stack and interfaces. Each of these namespaces plays a specific role in containerization technology by offering various levels of resource isolation, but it is the ipc namespace that is dedicated to inter-process communication.