The Linux system is controlled by the cron (Crond) system service. Linux systems have a lot of planned work on them, so this system service is started by default. In addition, because the user can set up scheduled tasks themselves, the Linux system
The Linux system is controlled by a cron (Crond) system service. The Linux system already has a lot of planned work on it, so this system service is started by default. In addition, because the user can set the scheduled task themselves, the Linux
The AT command is a routine scheduled task that runs only once, and the Linux system is controlled by a cron (Crond) system service. The Linux system already has a lot of planned work on it, so this system service is started by default. In addition,
(This article turns to the Arrogant Cow blog, only for oneself study)Descriptiondirectory where all user crontab files are stored, named by user nameWhat the crontab file means:In the crontab file created by the user, each line represents a task,
One, crontab is what.
1. Timing Task Software Type
At the scheduled command that ends only once, you need to start a back-end ATD service.Crontab need to start a service Crond, Crond service is implemented through Crontab command.Anacron can not
Basic format:whichMinute: Represents a minute, which can be any integer from 0 to 59.Hour: Represents an hour, which can be any integer from 0 to 23.Day: Represents a date, which can be any integer from 1 to 31.Month: Represents the month, which can
Crontab Concept/Introduction
The crontab command is used to set instructions that are periodically executed. This command reads the instruction from the standard input device and stores it in a "crontab" file for later reading and execution.
Cron
1. crontabIntroduction
The crontab command schedules the execution of some commands at certain intervals.
1.1/etc/crontab file
There is a crontab file in the/etc directory, which stores some scheduling tasks that are running
1. crontabIntroduction
The crontab command schedules the execution of some commands at certain intervals.
1.1/etc/crontab file
There is a crontab file in the/etc directory, which stores some scheduling programs that are running systematically.
With the crontab command, we can execute the specified system instructions or shell script scripts at a fixed interval of time. The unit of time interval can be any combination of minutes, hours, days, months, weeks, and more. This command is ideal
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.