ssh-keygen -lf ~/.ssh/id_rsa.pub                                                                                                                                            ✔  ⚙  10190  21:32:26
4096 SHA256:KA6hQlXvTVDOtdH6fBWAG753AO41goZnMyE6JDRVEfk [email protected] (RSA)



 ssh-add -l                                                                                                                                                        SIGINT(2) ↵  ⚙  10199  21:39:39
2048 SHA256:hvFtOBkcVFiBB2uT/SbDncxJgsKQtwfpPfG0BeKmgNQ  (RSA)
2048 SHA256:k8KZOZablKC/xMnAB1KguFY7j0Kd6iKnca60t99JfW8 /Users/nzeng4/.ssh/id_rsa (RSA)