Adding a New Systemd Service

To create a custom service that is managed by systemd, you must create a service unit file and define its configuration.

Step 1: Create the Service File

Create a new service file

sudo vim /etc/systemd/system/[service_name].service

Create a new file with the `.service` extension in the `/etc/systemd/system/` directory.

Step 2: Add the Configuration

The service file uses an INI-style syntax with sections like `[Unit]`, `[Service]`, and `[Install]`.

[Unit]
Description=Description of the service
After=network.target

[Service]
ExecStart=/path/to/your/application
Restart=always
User=your_username

[Install]
WantedBy=multi-user.target

Key Configuration Options

`Description`: A brief description of the service.
`After`: Specifies that this service should start after the `network.target` unit is loaded.
`ExecStart`: The full path to the executable or script that starts the service.
`Restart`: Defines when the service should be restarted (e.g., `always`, `on-failure`).
`User`: The user that the service will run as.
`WantedBy`: The target that will start this service (e.g., `multi-user.target` for a multi-user environment).

Step 3: Reload and Enable

Reload the systemd configuration

sudo systemctl daemon-reload

This command tells systemd to reload its configuration files, making your new service file available.

Enable and start the service

sudo systemctl enable [service_name]

Enables your new service to start on boot.

sudo systemctl start [service_name]

Starts the service immediately.