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Cron

cron is a time-based job scheduler. A scheduled job is known as a cron job. Although typically used to automate system maintenance and administration it can be used to automate any task. cron is most suitable for scheduling repetitive tasks, as scheduling a one-time task can be accomplished via at.

History, Overview & Cron expression

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Developer
AT&T Bell Laboratories
Operating system
Unix and Unix-like, Plan 9, Inferno
Release
May 1975; 51 years ago (1975-05)
Type
Job scheduler
Written in
C

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Overview

History

Cron expression

Advanced semantic analysis

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Map overview Semantic statistics

Cron

Nodes58
Edges57
Triples80
Avg. degree1.97
Density0.034483
Components1

How this topic connects Entity context

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Cron

Top relations

related to Modern versions · 15
Cron → Anacron, BSDs, GNU Project, In, ISC Cron, January, Linux, PAM, Paul Vixie, Red Hat, SELinux, The, Version, Vixie, With
related to Multi-user capability · 13
Cron → ACM, An, August, Communications, Franta, In, Kurt Maly, MIPS, The, Though, Unix, Unix System, Unix-like
related to Early versions · 6
Cron → Its, Read/usr/lib/crontabDetermine, Sleep, The, Unix, Version
related to External links · 6
Cron → ISC Cron, Shell, The Open GroupGNU, The Single UNIX Specification, Utilities Reference, Version
related to Standardization efforts · 5
Cron → In, OCPS, Open Cron Pattern Specification, The, Vixie
related to Nonstandard predefined scheduling definitions · 4
Cron → Debian, Since, Some, This
related to Time zone handling · 4
Cron → DST, Most, This, Thus
related to Non-standard characters · 3
Cron → Note, Quartz Java, The
related to overview · 3
Cron → Each, The, Users
see also · 3
Cron → LaunchdList, POSIX, Task Scheduler

Important terminology Word statistics

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Important terminology

time crontab daemon system job user run version file must users used task unix also scheduling files command event list

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
CronDeveloperAT&T Bell Laboratories1.00infobox
CronOperating systemUnix and Unix-like, Plan 9, Inferno1.00infobox
CronReleaseMay 1975; 51 years ago (1975-05)1.00infobox
CronTypeJob scheduler1.00infobox
CronWritten inC1.00infobox
Cronis atime-based job scheduler0.90text
Cronis amere pattern-matcher0.90text
first-weekdayinstance ofas well as supporting additional expression features0.80text
last-day-of-month.Nonstandard predefined scheduling definitionsSome cron implementations support the following non-standard macrosinstance ofas well as supporting additional expression features0.80text
PAMinstance ofadding features0.80text
SELinux supportinstance ofadding features0.80text
predefined schedulesinstance ofwith future versions planned to incrementally add features0.80text

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    Min side: 3
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