[sshd][Embedded] the problem of ssh-keygen

When I type ssh-keygen appear “You don’t exist, go away!”

Solution
vi /etc/passwd
    root:f1gq.d4uCBY5s:100:100:root:/:/bin/sh
-> root:f1gq.d4uCBY5s:0:0:root:/:/bin/sh

Reference:

• ssh says: You don’t exist, go away!