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The cron command-line utility is a job scheduler on Unix-like operating systems. Users who set up and maintain software environments use cron to schedule jobs [ 1 ] (commands or shell scripts ), also known as cron jobs , [ 2 ] [ 3 ] to run periodically at fixed times, dates, or intervals. [ 4 ]
It aims to replace Vixie-cron and Anacron with a single integrated program, providing many features missing from the original Cron daemon. [3] Some of the supported options permit: [3] run jobs one by one; set the max system load average value under which the job should be run; set a nice value for a job
This is a list of notable job scheduler software. Job scheduling applications are designed to carry out repetitive tasks as defined in a schedule based upon calendar and event conditions. This category of software is also called workload automation. Only products with their own article are listed: ActiveBatch; Apache Airflow; Cron; DIET; HTCondor
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.
UNIX History – a timeline of UNIX 1969 and its descendants at present Concise Microsoft O.S. Timeline – a color-coded concise timeline for various Microsoft operating systems (1981–present) Bitsavers – an effort to capture, salvage, and archive historical computer software and manuals from minicomputers and mainframes of the 1950s ...
The Unix program which spawns all other processes. As of 2016, for major Linux distributions, it has been replaced by systemd. [2] biod [3] Works in cooperation with the remote nfsd to handle client NFS requests. crond [1] Time-based job scheduler, runs jobs in the background. dhcpd: Dynamically configure TCP/IP information for clients. fingerd
Unix systems commonly run "housekeeping chores" such as log rotation, unused files deletion, indexing local files for the search engine, sending disk usage reports, etc. A program called cron may be used to schedule these tasks. With cron, tasks are commonly scheduled to be executed when the system is expected to be idle. If the system is off ...
As with cron, many Unix systems allow the administrator to restrict access to the at command. at can be made to mail a user when done carrying out a scheduled job, can use more than one job queue, and can read a list of jobs to carry out from a file instead of standard input.