Batch 9: Obsidian插件/AI开源平替/Coze培训/TK面单/Ubuntu科学上网
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wiki/concepts/caffeinate.md
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wiki/concepts/caffeinate.md
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title: "caffeinate"
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type: concept
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tags: [macos, power-management, cli, server]
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date: 2026-03-15
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---
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## Definition
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caffeinate,macOS 内置工具,在指定命令执行期间临时阻止系统进入睡眠状态,不修改系统电源管理设置,执行完毕自动恢复睡眠行为。
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## Key Commands
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| 命令 | 作用 |
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|------|------|
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| `caffeinate -d` | 防止显示器睡眠 |
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| `caffeinate -i` | 防止系统空闲时睡眠 |
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| `caffeinate -s` | 防止系统睡眠 |
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| `caffeinate -u` | 模拟用户活动(防止睡眠) |
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| `caffeinate -d -i -s` | 全开,按 Ctrl+C 停止 |
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## Comparison with pmset
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- **pmset**:永久修改系统电源管理设置,重启后保持
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- **caffeinate**:临时防止睡眠,进程结束即恢复,适合一次性任务
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## Use Cases
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- 执行备份、拷贝等长时间任务时临时防止睡眠
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- 远程 SSH 会话中保持系统活跃
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## Related Concepts
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- [[pmset]]:永久电源管理配置
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- [[WOL]]:配合 caffeinate 使用,长时任务后远程唤醒
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## Source
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[[Mac-Mini-服务器配置-防止自动锁屏与睡眠]]
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