USB install was done on NFX150, but it is asking for a password with root login.

USB install was loaded on NFX150. When you login with root, it asks you for a password, but it should log you in and require you to set system root-authentication plain-text-password .

When Junos OS 18.1R1 was released for NFX150, amnesiac mode was not working properly. When it booted up, it would allow you in as root, if you use the password juniper123. However, the proper behavior is it should allow you in as root username, and the first commit would require you to " set system root-authentication plain-text-password xxxxxxxx ".

This has been fixed in Junos OS 18.2R1 and higher. If you do a USB Install, it is recommended to install Junos OS 18.2R1 or higher.