---
title: "Step 2. Verify that your server is ready for installation"
slug: "dpo-install-using-linux-verify-that-your-server-is-ready-for-installation"
updated: 2026-10-27T19:53:14Z
published: 2026-10-27T19:53:14Z
canonical: "docs.onespan.com/dpo-install-using-linux-verify-that-your-server-is-ready-for-installation"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.onespan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Step 2. Verify that your server is ready for installation

Run checks prior to installation using the nnl-install.sh script. It verifies that you’ve installed the right OS version, JDK version, and database version. It also checks database connectivity.

Using administrator privileges, run the script:

```plaintext
cd <NNL_HOME>/install/
./nnl-install.sh -pre-install-check
```

The script generates a text report. Review the report and fix any issues that were flagged.