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JUNOS 5.x password recovery procedure

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Article ID: JSA10304 SECURITY_ADVISORIES Last Updated: 09 May 2013Version: 3.0
Legacy Advisory Id:
FA-SW-0203-006
Product Affected:
The password recovery procedure for JUNOS release 5.x differs from previous JUNOS releases.
Problem:
The password recovery procedure for JUNOS release 5.x differs from previous JUNOS releases.
Solution:
When the system first boots, you need to interrupt the boot routine by pressing any key other than return and enter the recovery mode:
  1. 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>
    
  2. Enter single-user mode:
    Type '?' for a list of commands, 'help' for more detailed help.
    ok boot ?s
    
  3. Start the shell:
    System watchdog timer disabled
    Jan  1 00:36:47 init: /etc/spwd.db: No such file or directory
    Enter full pathname of shell or RETURN for /bin/sh: <Enter>
    
  4. Mount the virtual file systems:
    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...
    
  5. Enter recovery mode:
    # /usr/libexec/ui/recovery-mode
    
  6. Enter configuration mode, and either delete or change the root authentication password:
    root> configure 
    Entering configuration mode
    [edit]
    
    root# delete system root-authentication 
    
  7. Commit the changes, and exit configuration mode:
     [edit]
    root # commit 
    commit complete
    
    [edit]
    root@router# exit 
    
    Exiting configuration mode
    root@router> exit 
    
  8. Exit recovery mode and enter ?y? when prompted to reboot the system:
    Reboot the system? [y/n] y
    Terminated
    
  9. The system now reboots and changes made to root authentication are activated.
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