修改 systemd service 的环境变量，可以通过 sudo systemctl status <service_name> 来找到 service file path.
然后修改环境变量：
[Service]
Environment=PATH=:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:reload config 和重启 service
sudo systemctl daemon-reload
sudo systemctl restart