Difference between revisions of "System Settings/Task Scheduler"

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=== Usage === <!--T:3-->
 
=== Usage === <!--T:3-->
  
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First define what variables your application needs and their values, then select your application. When this is done you select at which times your application should be run and you're all set.
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Task Scheduler can be started by starting the '''System Settings''' application, and selecting <menuchoice>Startup and Shutdown -> Task Scheduler</menuchoice>.
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From "Configure and schedule tasks," new tasks can be added and existing tasks edited or removed.
  
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==== Adding a new task ====
In KDE 4.4 '''KCron''' is a module which could be found in <menuchoice>System Settings -> Advanced -> System section -> Task Scheduler</menuchoice>. If it is not present, please check that you have the '''kdeadmin''' package installed. In KDE 4.5 as well as in later versions you will find it in <menuchoice>System Settings -> System Administration section -> Task Scheduler</menuchoice>.  Some distros make '''KCron''' a separate package, so if it's not visible you should query your repository for it.
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* Click "New Task..." The '''Add of modify existing task''' dialog will be displayed.
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* Enter the command to be run. Click the folder icon to choose it from a dialog.
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* Enter a comment (optional). This should be descriptive, explaining what the task will do as the command may not always be obvious.
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* Click '''Enable this task''' to enable the task to run.
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* Click '''Run at system bootup''' to enable the script to run each time the system is booted.
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* Click '''Run every day''' to enable the script to run every day. This will automatically select the appropriate options.
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* Using the buttons, choose when the command should be run. Not all parameters are required, those not needed may be left blank.
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** Hours and Minutes are the time of day to run the task, not an interval.
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* When done, click OK. The task till be added, and scheduled if enabled.
  
 
=== Hints === <!--T:7-->
 
=== Hints === <!--T:7-->

Revision as of 00:06, 25 December 2018

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General Information

Preferences-system.png KCron is a tool for running applications in the background at regular intervals. It's a graphical interface to the Cron command.

KCron is a standard application that is prepackaged for KDE workspaces.

KCron in KDE SC 4


Usage

Task Scheduler can be started by starting the System Settings application, and selecting Startup and Shutdown -> Task Scheduler. From "Configure and schedule tasks," new tasks can be added and existing tasks edited or removed.

Adding a new task

  • Click "New Task..." The Add of modify existing task dialog will be displayed.
  • Enter the command to be run. Click the folder icon to choose it from a dialog.
  • Enter a comment (optional). This should be descriptive, explaining what the task will do as the command may not always be obvious.
  • Click Enable this task to enable the task to run.
  • Click Run at system bootup to enable the script to run each time the system is booted.
  • Click Run every day to enable the script to run every day. This will automatically select the appropriate options.
  • Using the buttons, choose when the command should be run. Not all parameters are required, those not needed may be left blank.
    • Hours and Minutes are the time of day to run the task, not an interval.
  • When done, click OK. The task till be added, and scheduled if enabled.

Hints

  • All the files that are modified are located in the /etc/cron directory where there are numerous files to look at.
  • The command-line tool that allows you to have a look at the currently installed cron-jobs is
    crontab -l
    (that's the letter L).

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