# 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.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://helpcenter.xopero.com/xopero-one-en/common-issues/workstations-and-servers/agent-not-visible-in-xms-after-successful-installation-linux.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.