How to recover password on Juniper Router's
In the real world, you always have a chance to lose a password. Recovring root password can be done by booting Juniper router under a specific mode: Single-User-Mode
· From console, interrupt the boot routine:
Hit [Enter] to boot immediately, or any other key for command
prompt.
Booting [kernel] in 9 seconds...
< Press the space bar at this point >
· Enter into single-user mode:
Type '?' for a list of commands, 'help' for more detailed help.
ok boot -s
· Enter the shell:
· Mount the virtual file systems (for JUNOS 5.4 and above, it is not
necessary to mount the jbase package, however the other packages still need to be mounted):
NOTE: to go to multi-user operation, exit the single-user shell
(with ^D)
# cd /packages
# ./mount.jbase
Mounted jbase package on /dev/vn1...
# ./mount.jkernel
Mounted jkernel package on /dev/vn2...
# ./mount.jroute
Mounted jroute package on /dev/vn3...
· Enter recovery mode:
# /usr/libexec/ui/recovery-mode
· Enter configuration mode and either delete or change the root
authentication password:
root> configure
Entering configuration mode
[edit]
root# delete system root-authentication
· Commit the changes, and exit configuration mode
[edit]
root # commit
commit complete
[edit]
root@router# exit
Exiting configuration mode
root@router> exit
Exit recovery mode and enter "y" when prompted to reboot the system:
Reboot the system? [y/n] y
Terminated
The system now reboots and changes made to root authentication are activated.
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