Here are the steps to install Elasticsearch on Ubuntu:

1. Update your system: Use the following command to update your system:

sudo apt update

1. Import the Elasticsearch public GPG key into APT: You can use cURL for this12. Here is the command:

curl -fsSL https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -

1. Add the Elasticsearch source list to the sources.list.d directory12. Use this command:

echo "deb https://artifacts.elastic.co/packages/7.x/apt stable main" | sudo tee -a /etc/apt/sources.list.d/elastic-7.x.list

1. Update your package lists so APT will read the new Elastic source12. Here is the command:

sudo apt update

1. Install Elasticsearch using this command12:

sudo apt install elasticsearch

1. Reload the daemon services and enable Elasticsearch to start on boot12.
2. Start the Elasticsearch service and check its status12.
3. Edit the elasticsearch.yml file and configure the host IP, port, and discovery settings2.
4. Restart the Elasticsearch service and check its status again12.
5. Go to the browser and enter the IP and port of the host to see the Elasticsearch configuration2.