# APM Insight Next.js agent - Checksum Validation

You can verify the authenticity of the downloaded APM Insight Next.js agent with SHA256 checksum validation. This ensures that the agent you downloaded is safe to use and has not been tampered with by malicious code or software.

To verify the authenticity of the agent, follow the steps given below:

1. Compare the checksum value provided below with the downloaded agent.

   ```text
   7533d9bc41b29d0e68ec529cd6db63cc2cabe28a5db2d5968c721b1610bb0359
   ```

2. Execute the command given below to validate the checksum value:
   - For Linux systems, execute the following command:

     ```bash
     sha256sum apm_insight_agent_nextjs.zip
     ```

   - For Windows, you can use either of the following commands:
     - Open Command Prompt and execute the following command:

       ```batch
       certutil -hashfile apm_insight_agent_nextjs.zip SHA256
       ```

     - Open Windows PowerShell and execute the following command:

       ```powershell
       Get-FileHash apm_insight_agent_nextjs.zip -Algorithm SHA256
       ```

3. After executing the command, you will obtain a checksum value. Compare that value with the checksum value provided above.

**Sample output:**

![Applications Manager APM Insight Next.js agent checksum verification output](https://cdn.manageengine.com/sites/meweb/images/applications_manager/help/apm-insight-nextjs-agent-checksum-verification-output.png)

**Note:** If the checksum values differ, do not unzip or open the file.