How to install elasticsearch in ubuntu

About Elasticsearch.

Elasticsearch is the distributed search and analytics engine at the heart of the Elastic Stack. Logstash and Beats facilitate collecting, aggregating, and enriching your data and storing it in Elasticsearch. Kibana enables you to interactively explore, visualize, and share insights into your data and manage and monitor the stack. Elasticsearch is where the indexing, search, and analysis magic happens.

Installing Elasticsearch.

We can install elasticsearch two way

Install ES using repository

We sign all of our packages with the Elasticsearch Signing Key (PGP key D88E42B4, available from https://pgp.mit.edu) with fingerprint:

4609 5ACC 8548 582C 1A26 99A9 D27D 666C D88E 42B4

Download and install the public signing key:

wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo gpg --dearmor -o /usr/share/keyrings/elasticsearch-keyring.gpg

You need to install the apt-transport-http package on debian before proceeding.

sudo apt-get install apt-transport-http

Save the repository definition to /etc/apt/sources.list.d/elastic-8.x.list:

echo "deb [signed-by=/usr/share/keyrings/elasticsearch-keyring.gpg] https://artifacts.elastic.co/packages/8.x/apt stable main" | sudo tee /etc/apt/sources.list.d/elastic-8.x.list

Note: These instructions do not use add-apt-repository for several reasons:
add-apt-repository adds entries to the system /etc/apt/sources.list file rather than a clean per-repository file in /etc/apt/sources.list.d
add-apt-repository is not part of the default install on many distributions and requires a number of non-default dependencies.
Older versions of add-apt-repository always add a deb-src entry which will cause errors because we do not provide a source package. If you have added the deb-src entry, you will see an error like the following until you delete the deb-src line:
Unable to find expected entry ‘main/source/Sources’ in Release file (Wrong sources.list entry or malformed file)

You can install the Elasticsearch Debian package with:

sudo apt-get update && sudo apt-get install elasticsearch

Download .deb files from official website.

The Debian package for Elasticsearch v8.10.4 can be downloaded from the website and installed as follows:

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-8.10.4-amd64.deb
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-8.10.4-amd64.deb.sha512
shasum -a 512 -c elasticsearch-8.10.4-amd64.deb.sha512 
sudo dpkg -i elasticsearch-8.10.4-amd64.deb

Thant’s all for install elasticsearch in Ubuntu.