RSA key fingerprint is SHA256:xxxxxxxxxxxxxxE8AikJYKwbHaxvSc0ojez9YXaGp1A.This key is not known by any other namesAre you sure you want to continue connecting (yes/no/[fingerprint])? yes - (when prompt type yes and press enter)Warning: Permanently added 'bitbucket.org' (RSA) to the list of known hosts.authenticated via ssh key.You can use git to connect to Bitbucket. Shell access is disabled.
bitbucket-ssh.pub file content must be added to bitbucket under SSH key section.for details - https://support.atlassian.com/bitbucket-cloud/docs/set-up-personal-ssh-keys-on-linux/