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.
The story starts with quantum field theory, which is incredibly complex, but the simplified version is that even empty space is filled with fields that could govern the interactions of any quantum objects in or near that space. You can think of different particles as energetic excitements of these fields—so a photon is simply an energetic state of the quantum field.
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goes to zero it can be returned to the operating system
It’s that time of year: A whole bunch of Pokémon news is incoming. February 27th is the date the franchise first debuted, and The Pokémon Company uses it as a chance to outline its plans in a Pokémon Presents showcase. Last year’s event included the announcement of Pokémon Champions, and the 2026 edition should be particularly big, as this year represents the franchise’s 30th anniversary.
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當世界逐步倒退回二戰前的國際秩序，「中等強國」面臨前所未有的新挑戰2026年1月26日，详情可参考快连下载安装
Jim Lovell spoke to the BBC about Apollo 13Apollo 13: Bonus 1. Jim Lovell