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# My server shows as offline. What should I check?

A server shows as offline when the agent has not sent a heartbeat for more than 3 minutes. Check the systemd service, outbound connectivity, the server clock, and the agent log.

2 min readUpdated: October 22, 2026[Baca dalam Bahasa Indonesia](/help/agent-offline)

The agent sends a heartbeat to the control plane every 60 seconds. If no heartbeat arrives for more than 3 minutes, the server is marked **Offline**, a _server down_ alert is created, and a notification is sent to your channels. As soon as a heartbeat arrives again, the server is back online and the alert closes automatically.

## Check on the server

1.  Make sure the service is running:

```bash
systemctl status lt-backup
sudo systemctl restart lt-backup
```

1.  Look at the agent status and log:

```bash
sudo lt-backup status
journalctl -u lt-backup -n 100 --no-pager
```

`lt-backup status` shows whether the control plane is reachable. If it says _TIDAK terjangkau_ (not reachable), the problem is in the network.

1.  Make sure outbound HTTPS to `https://linuxteknosia.cloud` is allowed by your firewall or proxy:

```bash
curl -s https://linuxteknosia.cloud/api/v1/health
```

1.  Make sure the server clock is accurate. Every agent request is signed with a timestamp, and a difference of more than 5 minutes is rejected:

```bash
timedatectl
```

Enable time synchronisation (NTP) if the clock drifts.

## Other causes

-   The server was shut down, rebooted, or ran out of resources.
-   The `/etc/lt-backup` folder was deleted or moved; register the server again with a new token from **Servers → Add server**.
-   The server was deleted from the dashboard; the agent on it is no longer accepted.

While the agent is offline, scheduled backups may be missed or fail, and dashboard commands (restore, connection test, update) wait. Pending commands are delivered as soon as the agent reconnects.

If every check looks fine but the server stays offline, open a support ticket and attach the output of `lt-backup status` and a recent log excerpt.

## See also

-   [Installing the agent](/docs/pasang-agent)
-   [Notifications and alerts](/docs/notifikasi)

Still need help?

Open a support ticket from the dashboard and our team will reply as soon as possible.

[Browse the docs](/en/docs)[Open a ticket](/app/support/new)