61 lines
1.2 KiB
Markdown
61 lines
1.2 KiB
Markdown
---
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id: systemd
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title: "systemd"
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type: concept
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tags: [linux, service-manager]
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date: 2026-04-16
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---
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## Definition
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systemd 是 Linux 系统的服务管理器，负责管理系统进程、服务和启动项，是大多数现代 Linux 发行版的初始系统。
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## Key Components
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- **systemd**：系统和服务管理器
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- **systemctl**：命令行管理工具
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- **journald**：日志收集系统
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- **unit files**：服务配置文件（.service）
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## Common Commands
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```bash
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# 启动服务
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sudo systemctl start <service>
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# 停止服务
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sudo systemctl stop <service>
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# 重启服务
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sudo systemctl restart <service>
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# 查看状态
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sudo systemctl status <service>
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# 开机自启
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sudo systemctl enable <service>
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# 禁用开机自启
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sudo systemctl disable <service>
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# 查看日志
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sudo journalctl -u <service>
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```
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## Unit File Structure
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```ini
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[Unit]
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Description=<description>
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After=network-online.target
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Wants=network-online.target
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[Service]
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Type=simple
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ExecStart=/path/to/executable
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Restart=on-failure
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RestartSec=10
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[Install]
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WantedBy=multi-user.target
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```
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## Connections
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- [[systemd]] ← manages ← [[Linux系统服务]]
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- [[systemd]] ← writes_logs_to ← [[journald]] |