---
title: "Installing the Low Latency Kernel in Ubuntu"
slug: "installing-the-low-latency-kernel-in-ubuntu"
updated: 2024-10-30T10:59:02Z
published: 2024-10-30T10:59:02Z
canonical: "docs.telosalliance.com/installing-the-low-latency-kernel-in-ubuntu"
---

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

# Installing the Low Latency Kernel in Ubuntu

## Scope

This document provides a scripted installation of the low latency kernel on Ubuntu Linux.

## Prerequisites

- Ubuntu Server 20.04 or 22.04 on metal or AWS
- Internet access or Gateway to allow the script to download the low latency kernel from the Canonical repositories
- **AWS ONLY Prerequisite** - If you are installing the low latency kernel on an AWS EC2 instance, run the command below prior to proceeding to the [Online Install](/v1/docs/installing-the-low-latency-kernel-in-ubuntu#online-install) or [Offline Install](/v1/docs/installing-the-low-latency-kernel-in-ubuntu#offline-install) portions of this document. The `40-force-partuuid.cfg` file must be removed from the EC2 host or it could get stuck in a boot loop. The command below prevents this from occurring.
  - ```plaintext
sudo rm -f /etc/default/grub.d/40-force-partuuid.cfg
```

## Online Install

Copy/paste the command below into the Linux CLI to download and run the script:

```plaintext
curl -sSf https://telos-public.s3.amazonaws.com/devops/install-low-latency-kernel.sh | bash
```

Reboot the host:

```plaintext
sudo reboot now
```

The host will boot and persist into the most current Ubuntu low latency kernel.

## Offline Install

> [!NOTE]
> Please note that the Offline install still needs to download/install the low latency kernel via the apt package manager. The script assumes access to the Canonical repositories.

Download the script locally and copy to the target system:

```plaintext
https://telos-public.s3.amazonaws.com/devops/install-low-latency-kernel.sh
```

From the Linux CLI on the target system, run the command below to make the script executable:

```plaintext
sudo chmod +x install-low-latency-kernel.sh
```

Run the script to install the low latency kernel:

```plaintext
sudo sh ./install-low-latency-kernel.sh
```

Reboot the host:

```plaintext
sudo reboot now
```

The host will boot and persist into the most current Ubuntu low latency kernel.

## Troubleshooting

To verify which kernel your Ubuntu system is booted into, run the command below:

```plaintext
uname -r
```

Example Output:

```plaintext
ubuntu@APP-123456789:~$ uname -r

5.4.0-162-lowlatency
```