System Settings/Task Scheduler/zh-cn: Difference between revisions

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KCron是个标准的KDE工作区应用程序。
KCron是个标准的KDE工作区应用程序。
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Task Scheduler is a graphical front end to the standard "cron" utility. With it, commands (or "tasks") can be run at specific times, on a certain day or date, or at specific intervals (time between execution).
[[Image:Kcron-screenshot-de.png|thumb|300px|center|Task Scheduler in Plasma 5]]


=== 用法 ===
=== 用法 ===
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* Enter the name of the variable to use. This name:
* Enter the name of the variable to use. This name:
** Must consist of letters, digits, and underscore ('_') only
** Must consist of letters, digits, and underscore ('_') only
** Must start with a latter
** 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
** Should not be a reserved or commonly used system variable. See https://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html for more information


Latest revision as of 08:30, 1 June 2019

Other languages:

常规信息

KCron是个定期在后台运行程序的工具。他是Cron命令的图形界面。

KCron是个标准的KDE工作区应用程序。

Task Scheduler is a graphical front end to the standard "cron" utility. With it, commands (or "tasks") can be run at specific times, on a certain day or date, or at specific intervals (time between execution).

Task Scheduler in Plasma 5

用法

到了KDE 4.4 中KCron 是系统设定-> 高阶-> 系统 -> 任务调度 的模组。如果没找到，请检查是否已安装kdeadmin 包。 KDE 4.5 中是在 系统设定-> 系统管理员-> 任务调度 。一些发行版将 KCron单独弄成一个包，所以你得自己找找。

Adding and Modifying tasks

  • Click New Task... to add a new task, or "Modify" to modify an existing task. The Add or modify existing task page will be displayed.
The "Add or modify task" page of SystemSettings
  • 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 will be added and scheduled if enabled.

Tip

Click Run Now 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.

  • The value the variable will contain. This can be a number or string.
  • Enter a brief description of the variable.

提示

  • 全部修改的文件都位于拥有许多文件的/etc/cron目录。
  • 查看现在安装好的cron任务的命令行工具是
    crontab -l
    （小写的字母L）

More Information

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