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Kernel Name File access control Disable memory execution support Kernel ASLR Mandatory access control Capability-based security In-kernel key management Audit API Sandbox SYN flood protection UDP flood protection Ping flood protection Smurf attack protection Network Behavior Analysis; Linux Traditional Unix permissions, POSIX ACL: Yes Yes
Support giving names to anonymous memory [69] Mitigate straight-line speculation attacks [70] Used in Ubuntu 22.04 LTS on newer hardware [71] Named Superb Owl [72] 5.16 9 January 2022 [73] 5.16.20 [74] April 2022 [74] New futex_waitv() system call for faster game performance [75]
Ubuntu releases are also given code names, using an adjective and an animal with the same first letter – an alliteration, e.g., "Dapper Drake".With the exception of the first two releases, code names are in alphabetical order, and except for the first three releases, the first letters are sequential, allowing a quick determination of which release is newer.
Multiserver Microkernel (Hurd kernel) or Monolithic (Linux-libre kernel, fork of Linux kernel, and other kernels which are not part of the GNU Project) C: 1:1 Unix-like: 2.4 on Linux-libre kernel (not on Hurd kernel) Linux: ReactOS: GPL, LGPL Hybrid C, C++ Windows-like: No RISC OS: Apache 2.0 Monolithic (with cooperative multitasking) ARM ...
The Linux kernel is a free and open source, [11]: 4 Unix-like kernel that is used in many computer systems worldwide. The kernel was created by Linus Torvalds in 1991 and was soon adopted as the kernel for the GNU operating system (OS) which was created to be a free replacement for Unix.
Source code (e.g., the kernel source code with its header files). /usr/X11R6: X Window System, Version 11, Release 6 (up to FHS-2.3, optional). /var: Variable files: files whose content is expected to continually change during normal operation of the system, such as logs, spool files, and temporary e-mail files. /var/cache: Application cache data.
kernel In some operating systems, the OS is split into a low level region called the kernel and higher level code that relies on the kernel. Typically the kernel implements processes but its code does not run as part of a process. [disputed – discuss] hybrid kernel monolithic kernel Nucleus
This is a list of real-time operating systems (RTOSs). This is an operating system in which the time taken to process an input stimulus is less than the time lapsed until the next input stimulus of the same type.