type: ssh-keygen -t ed25519 -C "gcanete@dnamicro.com"
output:
Generating public/private ed25519 key pair.
Enter file in which to save the key (/home/user/.ssh/id_ed25519):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
type cat ~/.ssh/id_ed25519.pub
copy all the text and paste on the GitLab key text
type ssh -T git@http://gitlab.dnamicro.net/
type git clone git@gitlab.dnamicro.net:gcanete/simpleandroidproject.git