Generate a SSH Key Pair:
>ssh-keygen -m PEM -t rsa
>ssh-keygen -m PEM -t rsa -C "tim" -f /home/dir/id_rsa
Convert SSH2 Public Key to OpenSSH Public Key
>ssh-keygen -i -f id_ssh2.pub > id_openssh.pub
Convert OpenSSH Public Key to SSH2 Public Key
>ssh-keygen -e -f id_openssh.pub > id_ssh2.pub
Get Key Fingerprint MD5
ssh-keyscan -p [port] [hostname] > [hostkeyfpfile]
ssh-keygen -l -f [hostkeyfpfile] -E md5
Start session with alternate key
sftp -o IdentityFile=/home/tim/.ssh/id_rsa_2 tim@server1