Restoring Junos Os; Creating An Emergency Boot Device - Juniper EX4600 Series Hardware Manual

CHAPTER 24

Restoring Junos OS

Creating an Emergency Boot Device

Copyright © 2014, Juniper Networks, Inc.
Creating an Emergency Boot Device on page 199
Performing a Recovery Installation on page 201
If Junos OS on the device is damaged in some way that prevents the software from
loading properly, you can use an emergency boot device to repartition the primary disk
and load a fresh installation of Junos OS. Use the following procedure to create an
emergency boot device.
Before you begin, you need to download the installation media image for your device
and Junos OS release from
NOTE: In the following procedure, we assume that you are creating the
emergency boot device on a switch. You can create the emergency boot
device on another Juniper Networks switch or router, or any PC or laptop that
supports Linux. The steps you take to create the emergency boot device vary,
depending on the device.
To create an emergency boot device:
Use FTP to copy the installation media image into the
1.
Insert a USB device into the USB port.
2.
From the Junos OS command-line interface (CLI), start the shell:
3.
user@device> start shell
%
Switch to the root account using the
4.
% su
Password: password
NOTE: The password is the root password for the device. If you logged in
to the device as root, you do not need to perform this step.
http://www.juniper.net/customers/support/
command:
su
.
directory on the device.
/var/tmp
199