This article provides step-by-step instructions on how I deployed the Nethermind Lodestar client on a Ubuntu 20.04 machine following the documention on Nethermind's site. Nethermind is an Ethereum client implementation, and Lodestar is an Ethereum 2.0 Beacon Chain client.

Note: To follow along, ensure that you have administrative privileges or sudo access on your Ubuntu 20.04 server.

Prerequisites

Before you begin, make sure you have the following prerequisites:

• Ubuntu 20.04 server with SSH access

• Internet connection

• Basic knowledge of Linux command line

• Administrative access or sudo privileges

Step 1: Update and Upgrade

Start by updating the package list and upgrading installed packages:

sudo apt update
sudo apt upgrade

Step 2: Install Nethermind

You'll need Node.js and npm (Node Package Manager) to run Lodestar. Install them using the following commands:

sudo add-apt-repository ppa:nethermindeth/nethermind
sudo apt install nethermind
nethermind --version

Step 2: Install Concensus client

This required installing git, docker and docker compose which I already had all but docker compose installed on my machine. I installed docker compose and went on to pull chainsafe Lodestar image

docker-compose --version`

docker pull docker pull chainsafe/lodestar

Step 3: Created a JWT secret file

openssl rand -hex 32 | tr -d "\n" > "/tmp/jwtsecret"

Step 4: Clone the Lodestar Repository

Clone the Lodestar repository from GitHub:

git clone https://github.com/ChainSafe/lodestar.git
cd lodestar-quickstart

Step 4: Running Lodestar on Sepolia network

In the Lodestar directory type in the following command:

./setup.sh --dataDir --elClient nethermind --network sepolia --justCL --skipImagePull
./setup.sh --dataDir sepolia-data --elClient nethermind --network sepolia --justCL --skipImagePull --detached

Step 5: Running Nethermind

Start Nethermind:

nethermind -c mainnet

This command is instructing Nethermind to start and use the configuration settings for connecting to the Ethereum mainnet

Check out my github here