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Some cron implementations, such as the popular 4th BSD edition written by Paul Vixie and included in many Linux distributions, add a sixth field: an account username that runs the specified job (subject to user existence and permissions). This is allowed only in the system crontabs—not in others, which are each assigned to a single user to ...
anacron is a computer program that performs periodic command scheduling, which is traditionally done by cron, but without assuming that the system is running continuously.. Thus, it can be used to control the execution of daily, weekly, and monthly jobs (or anything with a period of n days) on systems that don't run 24 hours a
Ubuntu (/ ʊ ˈ b ʊ n t uː / ⓘ uu-BUUN-too) [9] is a Linux distribution derived from Debian and composed mostly of free and open-source software. [10] [11] [12] Ubuntu is officially released in multiple editions: Desktop, [13] Server, [14] and Core [15] for Internet of things devices [16] and robots.
Linux 4.19 Ubuntu 18.10 Fedora Linux 29 SerenityOS: 2018–11 ReactOS 0.4.10 2018–12 DragonFly BSD 5.4 FreeBSD 12.0 Linux 4.20 2019–01 2019–02 2019–03 iOS 12.2 watchOS 5.2 tvOS12.2 Linux 5.0 ReactOS 0.4.11 2019–04 Ubuntu 19.04 Fedora Linux 30 2019–05 Windows 10 May 2019 Update iOS 12.3 tvOS12.3 OpenBSD 6.5 NetBSD 8.1 Linux 5.1 Red ...
The Slurm Workload Manager, formerly known as Simple Linux Utility for Resource Management (SLURM), or simply Slurm, is a free and open-source job scheduler for Linux and Unix-like kernels, used by many of the world's supercomputers and computer clusters. It provides three key functions:
The Linux operating system is based on this kernel and deployed on both traditional computer systems such as personal computers and servers, usually in the form of Linux distributions (including Ubuntu and its derivatives), and on various embedded devices such as routers, wireless access points, PBXes, set-top boxes, FTA receivers, smart TVs ...
systemd tracks processes using the Linux kernel's cgroups subsystem instead of using process identifiers (PIDs); thus, daemons cannot "escape" systemd, not even by double-forking. systemd not only uses cgroups, but also augments them with systemd-nspawn and machinectl , two utility programs that facilitate the creation and management of Linux ...
apticron, a service designed to be run via cron to email notices of pending updates to a system administrator (sysadmin). APT Daemon, a front end that runs as a service to allow users to install software through PolicyKit and is in turn the framework used by Ubuntu software center (along with the Linux Mint software manager).