NamespaceWhat it isolatesWhat the process seesPIDProcess IDsOwn process tree, starts at PID 1MountFilesystem mount pointsOwn mount table, can have different rootNetworkNetwork interfaces, routingOwn interfaces, IP addresses, portsUserUID/GID mappingCan be root inside, nobody outsideUTSHostnameOwn hostnameIPCSysV IPC, POSIX message queuesOwn shared memory, semaphoresCgroupCgroup root directoryOwn cgroup hierarchyTimeSystem clocks (monotonic, boot)Own system uptime and clock offsetsNamespaces are what Docker containers use. When you run a container, it gets its own PID namespace (cannot see host processes), its own mount namespace (own filesystem view), its own network namespace (own interfaces), and so on.
However Nasa's lunar plans have a major missing part - the lander that will take astronauts to the Moon's surface has not yet been selected.
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“For me, the most challenging and surprising thing is I’ve got 130 owners plus that I work with all the time,” he says. “Life comes at them all the time… family issues and health issues and business issues… so the challenging part for me is still keeping them on track and working and building their business.”