以下过程是有关重置根密码并在运行JunOS的Juniper设备上保留当前配置的过程。

1.很快，您会看到"单击[Enter]立即启动，或者单击空格键以显示命令提示符。
"信息，只需按指示的空格键：

FreeBSD/PowerPC U-Boot bootstrap loader, Revision 2.1
([email protected], Wed Nov 6 11:23:55 PST 2008)
Memory: 1024MB
Loading /boot/defaults/loader.conf
/kernel data=0x8d8e8c+0x947cc syms=[0x4+0x7a1a0+0x4+0xad2a2]
Hit [Enter] to boot immediately, or space bar for command prompt.
Booting [/kernel] in 1 second…
Type ‘?’ for a list of commands, ‘help’ for more detailed help.

2.在提示符下，输入" boot -s"命令：

loader> boot -s

输出：

[...]
Trying to mount root from ufs:/dev/da0s2a
Attaching /packages/jbase via /dev/mdctl...
Mounted jbase package on /dev/md0...
System watchdog timer disabled
Enter full pathname of shell or 'recovery' for root password recovery or RETURN for /bin/sh: recovery

NOTE: Once in the CLI, you will need to enter configuration mode using
NOTE: the 'configure' command to make any required changes. For example,
NOTE: to reset the root password, type:
NOTE: configure
NOTE: set system root-authentication plain-text-password
NOTE: (enter the new password when asked)
NOTE: commit
NOTE: exit
NOTE: exit
NOTE: When you exit the CLI, you will be asked if you want to reboot
NOTE: the system

Starting CLI ...
{linecard:0}

3.使用" configure"命令进入配置模式：

root> configure
Entering configuration mode

{linecard:0}[edit]

4.输入命令" set system root-authentication plain-text-password"以设置新的JunOS根密码：

root# set system root-authentication plain-text-password
New password:
Retype new password:

{linecard:0}[edit]

5.提交更改：

root# commit

fpc0:
commit complete

{linecard:0}[edit]

6.退出配置和执行模式，然后按以下步骤重新引导系统：

root# exit
Exiting configuration mode

{linecard:0}
root> exit

Reboot the system? [y/n] y