A. user@router# save  rescue
B. user@router> request system configuration rescue save
C. user@router# save rescue configuration
D. user@router> file save rescue-configuration

A. It must include a root password.
B. It is rollback file number 50, and you can recover it by issuing rollback 50.
C. It is created by issuing request system configuration rescue save.
D. It is updated automatically when you commit.