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.
LLB: the intermediate representation
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But more than 2,000 job applications later he is still hunting, trying to make ends meet with jobs in package delivery and landscaping.
Unconsumed bodies: Pull semantics mean nothing happens until you iterate. No hidden resource retention. If you don't consume a stream, there's no background machinery holding connections open.，推荐阅读91视频获取更多信息