What is cron job how to write

Question

Accepted Answer

A cron job is a scheduled task that runs automatically at specific intervals on a Linux system.

Cron jobs are managed by the cron daemon, which reads a configuration file called crontab.
To write a cron job, you need to edit the crontab file using the 'crontab' command.
Each line in the crontab file represents a separate cron job and follows a specific format.
The format consists of five fields: minute, hour, day of month, month, and day of week.
You can use various symbols and operators to specify the timing of the cron job.
For example, '* * * * *' represents a cron job that runs every minute.
To execute a command or script as a cron job, you need to specify the command in the crontab file.
You can also redirect the output of the cron job to a file or send it via email.
To view the existing cron jobs, use the 'crontab -l' command.
To remove all cron jobs, use the 'crontab -r' command.

Accepted Answer

Crontab set- min hrs

Min hrs day of the month month day of week /path

Accepted Answer

To do a task or execute the script many times a day/week/months we need a application for that to do automatically, in linux it's a cron job.

As a root user create the etc/cron.allow file and add the user to whom you want to give the permission to create/list/remove the cron jobs

once the permission granted, then by typing crontab -e we can add the n number of cronjobs we want

cron timinig format replace * in the below example with required timings

minute Hour Day_of_the_Month Month Day_of_the_week

(0-59) (0-23) (1-31) (1-12) (0-6) ( mon to sun)

example
* * * * * sh /path/to/script.sh

Accepted Answer

defination : task shedular (run service or program at user define time )

run : open crontab with editor

the specify datetime accroding to crontab protocall (min,hour, day of month , month ,day of week ) then specify path to service and write cmd for running that service

Accepted Answer

It is a program in linux that is used to execute tasks at a scheduled time.

package-cronie

crontab -e

crontab -l

Accepted Answer

It is a program in linux that is used to execute tasks at a scheduled time.

What is cron job how to write

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