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.
Bats are seeking sanctuary in churches - but they're making an unholy mess
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但只要稍微理性分析，就会发现这根稻草，根本撑不起崩塌的大厦。
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In 2024-25, there were 80,196 gallbladder operations carried out by the NHS in England, compared to 69,745 in 2023-24, which is a 15% increase, and also the highest number in the past decade.