https://noviello.it/come-installare-elasticsearch-su-ubuntu-20-04-lts/

sudo apt install apt-transport-https ca-certificates wget

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

sudo sh -c 'echo "deb https://artifacts.elastic.co/packages/7.x/apt stable main" > /etc/apt/sources.list.d/elastic-7.x.list'

sudo apt install elasticsearch

sudo systemctl enable --now elasticsearch.service

curl -X GET "localhost:9200/"