====== Cheatsheet for Systemd ======

===== Typical Service File =====

<code ini /etc/systemd/system/orzbot.service>
[Unit]
Description=orzBot
After=network.target

[Service]
User=orzbot
Group=orzbot
SyslogIdentifier=orzbot.service
ExecStart=/home/orzbot/.nvm/nvm-exec node /home/orzbot/orzbot/app.js
WorkingDirectory=/home/orzbot/orzbot
Environment=ORZBOT_TOKEN=ventuaeiornuvyiopwefuvgyu
Environment=NODE_VERSION=8.1.0
Restart=always
RestartSec=5s
KillSignal=SIGINT
TimeoutStartSec=10
TimeoutStopSec=120

[Install]
WantedBy=multi-user.target
</code>

===== Commands =====
  * ''systemctl daemon-reload'' 修改配置文件后重载配置，但不影响任何既有进程
  * ''systemctl start orzbot''
  * ''systemctl stop orzbot''
  * ''systemctl restart orzbot''
  * ''systemctl status orzbot''
  * ''systemctl enable orzbot'' 根据配置文件中的 Install 安装，典型的是添加到 multi-user.target 目标，简单的说就是开机自启动
  * ''systemctl disable orzbot'' 与上行相反
  * ''journalctl -xe'' 查看日志
  * ''journalctl -xef'' tail 日志
  * ''journalctl -xe | grep orzbot''
  * ''journalctl -xef | grep orzbot''

(disclaimer for grep: has better way, but hard to remember)

===== See Alsos =====
  - https://wiki.archlinux.org/index.php/systemd

{{tag>systemd cheatsheet}}