Data loss will be costly. At the very least, critical data loss will have a financial impact on companies of all sizes. In some cases, it can cost your job. I’ve seen cases where sysadmins learned this in the hard way.
You create a pair of keys using
ssh-keygen. These are plain text and can be cut and pasted , copied, as required. One is private (e.g.
id_rsa), and you need to protect this as you would any other security artifact such as server passwords, and you can optionally
secure with a pass phrase. The other is public (e.g.
id_rsa.pub), and you can share with anyone.