ssh-keygen is a standard component of the Secure Shell protocol suite found on Unix, Unix-like and Microsoft Windows computer systems used to establish secure shell sessions between remote computers over insecure networks, through the use of various cryptographic techniques.
ls -a -l ~/.ssh SSH 파일 확인
ssh-keygen -t rsa SSH 키 생성
eval "$(ssh-agent -s)" ssh-agent 실행, environment 설정
ssh-add -K ~/.ssh/id_rsa 파일 등록
cat ~/.ssh/id_rsa.pub SSH key 확인(get)
ssh -T firstname.lastname@example.org github에 SSH key추가후 connection 확인