OpenSSH key pem和SSH2 key格式互转 - Bright's Blog - CSDN博客

“RFC4716” (RFC 4716/SSH2 public or private key)
“PKCS8” (PEM PKCS8 public key)
 
ubuntu:
ssh-keygen -e -f ~/.ssh/id_rsa.pub > ~/.ssh/id_rsa_pub.pem
ssh-keygen  -f ~/.ssh/id_rsa_pub.pem -i -m RFC4716 > ~/.ssh/id_rsa.pub

来源: OpenSSH key pem和SSH2 key格式互转 - Bright's Blog - CSDN博客