Systemindstillinger/Opgaveskemalægger
Generel information
Opgaveskemalæggeren en brugerflade til det almindelige "cron"-program. Med dette kan kommandoer (eller "opgaver") blive kørt på faste tidspunkter, på en given ugedag eller dato eller med et givet interval.
Brug
Opgaveskemalæggeren kan startes fra programmet Systemindstillinger. Vælg og så .
Tilføjning og ændring af opgaver
- Klik for at tilføje en ny opgave eller for at ændre en eksisterende opgave. Nu vises vinduet Tilføj eller ændr en skemalagt opgave.
- 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 . The task will be added and scheduled if enabled.
Tip
Click to run a task immediately after adding or modifying the task.
Removing a task
To completely remove a task, select the task from the list and click the Delete button. This will permanently remove the task.
Environment Variables
Sometimes a task or multiple tasks need a specific variable set, it must be added in the Environment Variables section. The cron utility uses its own environment, system-wide and user-specific variables are not used. Click New Variable to add a new variable definition, or Modify to change an existing variable.
- Enter the name of the variable to use. This name:
- Must consist of letters, digits, and underscore ('_') only
- Must start with a letter
- Should not be a reserved or commonly used system variable. See https://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html for more information
- The value the variable will contain. This can be a number or string.
- Enter a brief description of the variable.
Tips
- Alle de filer, som modificeres findes i mappen /etc/cron, hvor der er mange filer, som kan bruges som eksempler.
- Kommandolinje-værktøjet til at se det aktuelt installerede cron-job er
crontab -l
(det er bogstavet L).
More Information
- KDE official documentation
- Cron (Wikipedia)
- Cron (Arch Linux wiki)