Installing Elasticsearch on Ubuntu

Elasticsearch has been developed using Java Programming language. So Java has to be installed on your computer to install Elasticsearch. You can check the Java version using the following command. 

Check Java:

java -version

If Java is not installed you can install it using the following command.

sudo apt-get install openjdk-8-jdk

Adding Elastic Repository:

Import the PGP key for Elastic:

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

Install apt-transport-https:

sudo apt-get install apt-transport-https

Add Elastic to your computer repository list:

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

Install Elasticsearch Package:

sudo apt-get update 
sudo apt-get install elasticsearch

Configure Elasticsearch:

Uncomment and change network.host to localhost and uncomment http.port:

network.host: localhost

http.port: 9200

Start Elasticsearch:

sudo systemctl start elasticsearch

 Check Elasticsearch Status:

sudo systemctl status elasticsearch

 Stop Elasticsearch:

sudo systemctl stop elasticsearch

 Restart Elasticsearch:

sudo systemctl restart elasticsearch

Starting on boot:

sudo systemctl enable elasticsearch.service

Test Elasticsearch:

curl -X GET http://localhost:9200

Or Run http://localhost:9200 on the browser.

You will get the following output:

{
  "name" : "mamun",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "WGNg0KLfRMaEye9EVZXOWg",
  "version" : {
    "number" : "7.12.0",
    "build_flavor" : "default",
    "build_type" : "deb",
    "build_hash" : "78722783c38caa25a70982b5b042074cde5d3b3a",
    "build_date" : "2021-03-18T06:17:15.410153305Z",
    "build_snapshot" : false,
    "lucene_version" : "8.8.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}