> For the complete documentation index, see [llms.txt](https://helpcenter.xopero.com/xopero-one-en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://helpcenter.xopero.com/xopero-one-en/common-issues/workstations-and-servers/agent-not-visible-in-xms-after-successful-installation-linux.md).

# Agent not visible in XMS after successful installation (Linux)

## Issue

> The agent does not appear or is unavailable for activation after installation.

***

## Cause

On **RedHat**-based systems (such as **Fedora**, **CentOS**, or **RHEL**), if the **agent** is not visible after installation, it may indicate that some required components are missing.

***

## Resolution

1. Install **OpenSSL** and update certificates using the following commands:

```bash
yum install -y openssl11.x86_64 ca-certificates
```

```bash
update-ca-trust extract
```

2. Next, you can either restart your **Linux** system or restart only the **Xopero ONE agent** service using the following command:

```bash
systemctl restart XoperoONEBackupAgent.service
```

3. Once done, the **agent** should be available for activation.