systemd (init system & service manager)
Parent: DevOps, Infrastructure & Observability · researched 2026-06-01T01:52:29.769Z· 12 sources · 8 concepts · skill devops-infra
DevOps / infrastructure / observability family ROUTER. Split into focused sub-hubs — route to: devops-linux-internals (kernel, boot, memory/NUMA, storage/filesystems, virtualization, io_uring, cgroups
devops-infra
- DevOps / infrastructure / observability family ROUTER. Split into focused sub-hubs - route to: devops-linux-internals (kernel, boot, memory/NUMA, storage/filesystems, virtualization, io_uring, cgroups/namespaces, sandboxing, immutable Linux, privilege); devops-linux-admin (sysadmin, systemd, package management, shell scripting, host networking diagnostics); devops-containers-cicd (Docker, Kubernetes, CI/CD pipelines, Terraform/Kafka IaC, git workflows, library packaging); devops-observability (Node/OTel observability, Pino logging, Sentry, eBPF, Linux perf tracing). Pick the sub-hub matching the task. [source]
- This hub routes to on-demand reference files under references/. See each spoke for depth. [source]
Children
- Unit & object model (service/socket/target/timer/mount/slice/scope/path/device types, Type= readiness) (frontier)
- Dependency & ordering semantics (Wants/Requires/Requisite/BindsTo/PartOf, After/Before, drop-ins, presets, generators) (frontier)
- systemd-journald (Storage= volatile/persistent/auto/none, rotation/vacuum, rate-limiting, forwarding, Forward Secure Sealing, journal namespaces, remote journals) (frontier)
- cgroup-v2 resource control (slice/scope tree, CPUWeight/CPUQuota/AllowedCPUs, MemoryMin/Low/High/Max ladder, IOWeight, TasksMax, Delegate) (frontier)
- systemd-oomd (PSI-driven userspace OOM, ManagedOOMSwap/ManagedOOMMemoryPressure, oomd.conf) (frontier)
- System & configuration extensions (systemd-sysext /usr+/opt, systemd-confext /etc, DDIs/dm-verity, extension-release matching) (frontier)
- Portable services (portablectl, systemd-portabled, security profiles) (frontier)
- Execution sandbox (ProtectSystem/PrivateTmp/DynamicUser/CapabilityBoundingSet/SystemCallFilter, systemd-analyze security) (frontier)
Frontier under this node: Dependency & ordering semantics (Wants/Requires/Requisite/BindsTo/PartOf, After/Before, drop-ins, presets, generators), Execution sandbox (ProtectSystem/PrivateTmp/DynamicUser/CapabilityBoundingSet/SystemCallFilter, systemd-analyze security), Portable services (portablectl, systemd-portabled, security profiles), System & configuration extensions (systemd-sysext /usr+/opt, systemd-confext /etc, DDIs/dm-verity, extension-release matching), Unit & object model (service/socket/target/timer/mount/slice/scope/path/device types, Type= readiness), cgroup-v2 resource control (slice/scope tree, CPUWeight/CPUQuota/AllowedCPUs, MemoryMin/Low/High/Max ladder, IOWeight, TasksMax, Delegate), systemd-journald (Storage= volatile/persistent/auto/none, rotation/vacuum, rate-limiting, forwarding, Forward Secure Sealing, journal namespaces, remote journals), systemd-oomd (PSI-driven userspace OOM, ManagedOOMSwap/ManagedOOMMemoryPressure, oomd.conf)