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{{Systemd/breadcrumb}}
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<div lang="en" dir="ltr" class="mw-content-ltr">
定时器是 systemd 中名称以 .timer 结尾的单元文件，用于控制 .service 文件或事件。定时器可以用作 <code>cron</code> 的替代方案。定时器内置对基于日历的事件和普通时间事件的支持，并且可以异步运行。
Timers are systemd unit files whose name ends in .timer that control .service files or events. Timers can be used as an alternative to <code>cron</code>. Timers have built-in support for calendar-based events and monotonic time events, and can be run asynchronously.
<span id="Configuration"></span>
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== 配置 ==
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以下示例定时器每 5 分钟运行一次 systemd 单元以调用 bash 脚本。
== Configuration ==
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The following example timer runs a systemd unit every 5 minutes which invokes a bash script.
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systemd.timers."hello-world" = {
systemd.timers."hello-world" = {
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====Running timer on a schedule====
====Running timer on a schedule====


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以下示例每天启动一次（凌晨 12:00）。激活后，例如如果由于系统关闭错过了上次启动时间（同时设置选项 Persistent=true），，则会立即触发服务。
The following example starts once a day (at 12:00am). When activated, it triggers the service immediately if it missed the last start time (option Persistent=true), for example due to the system being powered off.
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};
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更多示例可以在 [https://wiki.archlinux.org/title/Systemd/Timers Arch Wiki] 和 <code>systemd.timer</code> 手册页中找到。
More examples can be found at the [https://wiki.archlinux.org/title/Systemd/Timers Arch Wiki] and at the <code>systemd.timer</code> manpage.
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== 用法 ==
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列出活跃定时器及其当前状态：
== Usage ==
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List active timers and their current state:
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<syntaxhighlight lang="bash">
<syntaxhighlight lang="bash">
systemctl list-timers
systemctl list-timers
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为了测试目的，手动运行一次服务：
Manually run a service once for testing purposes:
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<syntaxhighlight lang="bash">
<syntaxhighlight lang="bash">
systemctl start hello-world
systemctl start hello-world
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</syntaxhighlight>
[[Category:systemd]]
[[Category:systemd]]
Retrieved from "https://wiki.nixos.org/wiki/Systemd/timers/zh"