First, open vim (terminal.app) to see if there is a local SSH-Key
# ls -al ~/.ssh
>> If vim output is the following: there is no proof of local generation of SSH Key, do the second step.
# No such file or directory
>> If vim output is the following: proof of local SSH Key file already exists, do the fourth step.
# id_rsa id_rsa.pub
Second, if not, to generate a new SSH Key
#ssh-keygen -t rsa -C"you_email"
your_email: Here fill in the mailbox when you register GitLab or GitHub.
The latter suggesting a direct hit Enter, all the way to completion.
Third, generate and add SSH Key
# ssh-add ~/.ssh/id_rsa
Fourth, view the SSH Key
# cat /Users/xxx/.ssh/id_rsa.pub
xxx is your computer user name, for example: howieMacBook-Pro: howie keyword ~ howie $ in.
Good SSH Key generated by copying or GitHub GitLab added to the SSH Key can be.