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This article documents the version history of the Linux kernel. Each major version – identified by the first two numbers of a release version – is designated one of the following levels of support: Supported until next stable version; Long-term support (LTS); maintained for a few years [1]
Ubuntu 22.04 LTS Desktop uses Linux kernel 5.17 for newer hardware and a rolling HWE (hardware enablement) kernel based on version 5.15 for other hardware; Ubuntu 22.04 LTS Server uses version 5.15, while Ubuntu Cloud and Ubuntu for IoT use an optimized kernel based on version 5.15. It updates Python to 3.10 and Ruby to 3.0. [274]
Kernel name Programming language Used in Creator Executable format (also see section below) Type Integrated firewall SMP support Multiple architecture support (also see section below).
Loongson (MIPS-compatible), and models 2 and 2E, from BLX IC Design Ltd ; Some PlayStation 2 models, through the PS2 Linux project; PlayStation Portable uClinux 2.4.19 port [6] Broadcom wireless chipsets; Dreambox (HD models) [7] Cavium Octeon packet processors; OpenRISC (openrisc) OpenRISC 1000 family in the mainline Linux Kernel as of 3.1
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.
kpatch is a feature of the Linux kernel that implements live patching of a running kernel, which allows kernel patches to be applied while the kernel is still running. By avoiding the need for rebooting the system with a new kernel that contains the desired patches, kpatch aims to maximize the system uptime and availability.
Loadable kernel modules in Linux are loaded (and unloaded) by the modprobe command. They are located in /lib/modules or /usr/lib/modules and have had the extension .ko ("kernel object") since version 2.6 (previous versions used the .o extension). [5] The lsmod command lists the loaded kernel modules.
The LSB, version 3.1, is registered as an official ISO/IEC international standard. The main parts of it are: ISO/IEC 23360-1:2006 Linux Standard Base (LSB) core specification 3.1 — Part 1: Generic specification [11] ISO/IEC 23360-2:2006 Linux Standard Base (LSB) core specification 3.1 — Part 2: Specification for IA-32 architecture