permlink: https://gist.github.com/benjaminv/092f3d87afcbe589ca2a03fa9358050f
$ ssh-keygen -t rsa -b 4096 -C "[email protected]" -f ~/.ssh/id_rsa_benjaminv_github
$ ssh-keygen -t rsa -b 4096 -C "[email protected]" -f ~/.ssh/id_rsa_bendhu_github
$ ssh-keygen -t rsa -b 4096 -C "[email protected]" -f ~/.ssh/id_rsa_benhu1_gitlab
# The -C option is a comment to help identify the key.
# The -f option specifies the file name for the key pair.