SSH

# /usr/local/bin/ssh-keygen -t rsa -N "" #rsav2
# /usr/local/bin/ssh-keygen -t dsa -N "" #dsa
# /usr/local/bin/ssh-keygen -t rsa1 -N "" #rsav1

 see ./ssh

# /usr/bin/ssh-keygen -t rsa -N "" #rsav2

# vi id_rsa.pub
 copy

#vi /.ssh/authorized_keys
 paste
 delete line feed [vi Jx]