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Snippet from Wikipedia: Launchd

launchd is an init and operating system service management daemon created by Apple Inc. as part of macOS to replace its BSD-style init and SystemStarter. There have been efforts to port launchd to FreeBSD and derived systems.

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Linux Kernel:

Kernel:

• Linux Foundation
• Linux Mark Institute
• Linus's law
• Tanenbaum–Torvalds debate
• Tux
• SCO disputes
• Linaro
• GNU GPL v2
• menuconfig
• Supported computer architectures
• Kernel names
• Criticism

Support:

• Developers
  • The Linux Programming Interface
  • kernel.org
  • LKML
  • Linux conferences
• Users
  • Linux User Group (LUG)

Technical:

Linux Debugging:

• CRIU
• ftrace
• kdump
• Linux kernel oops
• SystemTap
• BPF

Linux startup process

• vmlinux
• System.map
• dracut
• initrd
• initramfs

Linux kernel interfaces - Linux ABIs

• Linux Standard Base
• x32 ABI

APIs

Kernel

SCI - Linux System Call Interface

• POSIX
  • ioctl
  • select
  • open
  • read
  • close
  • sync
  • …
• Linux-only
  • futex
  • epoll
  • splice
  • dnotify
  • inotify
  • readahead
  • …

In–kernel APIs - Linux In-kernel APIs

• ALSA
• Crypto API
• io uring
• DRM
• kernfs
• Memory barrier
• New API
• RCU
• Video4Linux

user space - Userspace:

Daemon (computing) - Daemons, Virtual file system - Linux File systems:

• devfs
• devpts
• debugfs
• Filesystem in userspace - FUSE
• procfs
• sysfs
• systemd
  • udev
• Kmscon

   | group2 = [[Wrapper library|Wrapper
libraries]] 
   | list2 =

• C standard library
  • glibc
  • uClibc
  • Bionic
    • libhybris
  • dietlibc
  • EGLIBC
  • klibc
  • musl
  • Newlib
• libcgroup
• libdrm
• libalsa
• libevdev
• libusb
• liburing

     }}
   }}

 | group5 = Components
 | list5  = 

• Kernel modules
• BlueZ
• cgroups
• Console
• bcache
• Device mapper
• dm-cache
• dm-crypt
• DRM
• EDAC
• evdev
• Kernel same-page merging (KSM)
• LIO
• Framebuffer
• LVM
• KMS driver
• Netfilter
• Netlink
• nftables
• Network scheduler
• perf
• SLUB
• zram
• zswap

• Process and I/O schedulers:
• O(n) scheduler
• O(1) scheduler
• Completely Fair Scheduler (CFS)
• Noop scheduler
• SCHED_DEADLINE

• Security Modules: AppArmor
• Exec Shield
• seccomp
• SELinux
• Smack
• Tomoyo Linux
• Linux PAM

• Device drivers
  • 802.11
  • graphics
• Raw device

• initramfs
• KernelCare
• kexec
• kGraft
• kpatch
• Ksplice

 | group6 = Variants
 | list6  =

• Mainline
  • Linux kernel
  • Linux-libre
• High-performance computing
  • INK
  • Compute Node Linux
  • SLURM
• Real-time computing
  • RTLinux
  • RTAI
  • Xenomai
  • Carrier Grade Linux
• MMU-less
  • μClinux
  • PSXLinux

{{Navbox|subgroup
   | group1 = [[Virtualization]]
   | list1  =

• Hypervisor
  • KVM
  • Xen
• OS-level virtualization
  • Linux-VServer
  • Lguest
  • LXC
  • OpenVZ
• Other
  • L4Linux
  • ELinOS
  • User-mode Linux
  • MkLinux
  • coLinux

       }}
     }}

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