1. 重启设备 2. 按空格键 3. loader>boot -s 4. recovery 5. user@host# set system root-authentication plain-text-password 6. Enter y to reboot the device. Reboot the system? [y/n] y loader>boot -s Enter full pathname of shell or 'recovery' for root password recovery or RETURN for /bin/sh: recovery user@host# set system root-authentication plain-text-password New password: juniper1 root@host# commit Reboot the system? [y/n] y