Container 02: UTS and PID Namespaces

The kernel keeps the table of processes. This stage gives one process its own, smaller table to look at.

Before you start. Container 01: Fork and Exec started a command as a child and found that the child sees the host’s hostname and the host’s process list. This stage takes away those two. A hostname is the machine’s name, the text hostname prints. A process id, or pid, is the number the kernel gives each running program (Processes, Threads & the Kernel). You need nothing else.