How to import the public GPG key for OpenSearch in Ubuntu based environment?

Trying to install OpenSearch in an Ubuntu-based environment. Recently moved over from old CentOS machine. What is the equivalent command below for ubuntu-based machines?

sudo rpm --import https://artifacts.opensearch.org/publickeys/opensearch.pgp

Solution

You can use gpg --import.
In your case I would do
wget -o opensearchkey https://artifacts.opensearch.org/publickeys/opensearch.pgp
and then
gpg --import opensearchkey
You can list the newly imported key by gpg --list-keys