nexus/wiki/concepts/systemd.md

id, title, type, tags, date

id	title	type	tags	date
systemd	systemd	concept	linux service-manager	2026-04-16

Definition

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。

Key Components

• systemd：系统和服务管理器
• systemctl：命令行管理工具
• journald：日志收集系统
• unit files：服务配置文件（.service）

Common Commands

# 启动服务
sudo systemctl start <service>

# 停止服务
sudo systemctl stop <service>

# 重启服务
sudo systemctl restart <service>

# 查看状态
sudo systemctl status <service>

# 开机自启
sudo systemctl enable <service>

# 禁用开机自启
sudo systemctl disable <service>

# 查看日志
sudo journalctl -u <service>

Unit File Structure

[Unit]
Description=<description>
After=network-online.target
Wants=network-online.target

[Service]
Type=simple
ExecStart=/path/to/executable
Restart=on-failure
RestartSec=10

[Install]
WantedBy=multi-user.target

Connections

• systemd ← manages ← Linux系统服务
• systemd ← writes_logs_to ← journald