新增“将服务安装为 Linux Systemd 服务”中文和英文文档链接。 (#28)

en/guide/network/install-as-a-systemd-service.md

@@ -0,0 +1,34 @@
+# Installing as a Linux Systemd Service
+
+On Linux distributions that support systemd, you can configure the service to start automatically with the system by following these steps:
+
+1. Create a new service file at `/etc/systemd/system/easytier.service` and modify the command line parameters after `ExecStart` as needed.
+
+```shell
+[Unit]
+Description=EasyTier Service
+After=network.target syslog.target
+Wants=network.target
+
+[Service]
+Type=simple
+ExecStart=/root/easytier-core --ipv4 x.x.x.x --network-name xxx --network-secret yyy --peers tcp://peer_host:11010
+
+[Install]
+WantedBy=multi-user.target
+```
+
+2. After saving the file, run the following command in the terminal to enable the service:
+
+```sh
+systemctl enable easytier.service
+```
+
+3. You can start and stop the service using the following commands:
+
+```sh
+systemctl start easytier.service
+systemctl stop easytier.service
+```
+
+Please note that using the `systemctl` command instead of the `service` command is the more modern approach, and it is recommended to use it on systems that support systemd.