How to schedule the execution of a task at regular intervals

[Ceesar]

Hi,
I need some details on a Linux service called as Cron. It is used for running a schedule task with regular interval of time. I had never applied this before. But I have some task which are needed to run manually. If this service can help me out to run them automatically at the set time. Does this software works in GUI mode. I need some information on the same. Thanks in advance.

[Lillebror]

Cron is a Unix daemon. Each user has a file, said cron table, which contains the names of programs to launch and execution frequency. Crontab is the program that provides an interface to the cron daemon. It is a unix, solarix utility that helps out to run some task automatically in the background. This can be scheduled after specific intervals by Cron Daemon.

[opaper]

Debian based OS can automatically perform recurring tasks. This is useful when setting up tasks to run regularly. Cron is a unix, solaris utility that allows tasks to be automatically run in the background at regular intervals by the cron daemon. These tasks are often termed as cron jobs in unix , solaris. Crontab (CRON TABle) is a file which contains the schedule of cron entries to be run and at specified times.

[MindSpace]

The Crontab schedule may be called in four ways. First crontab file name will define filename as cron table of the current user. Then crontab-l will display the contents of the cron table for the current user. And crontab-r will remove the cron table for the current user. Finally, crontab-e will launch a text editor to modify the default cron table of the current user (equivalent to vi / etc / crontab, if vi is the default editor).

[Modifier]

For this you will have to log on with the user who will perform these tasks automated and type: $crontab -e. A screen then appears listing the existing tasks and will therefore be a virgin if you are automating for the first time a task for a given user. It will then enter as many lines of process automation. But for that you must know the basic commands of cron.

[Praetor]

The intervals are allowed: if one says 1-4, the server will include 1 to 4. The star character means that the field is always checked. If placed on the month for example, the command will be executed regardless of the month. The string * / x indicates a period. A * / 15 placed on the minutes, it means: for every 00, 15, 30 and 45 minutes. Crontab-l lists the automated tasks for the current user.