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NOTE:
To reinstall Junos OS, you boot the router from the removable media. Do not insert the
removable media during normal operations. The router does not operate normally when it is
booted from the removable media.
When the router boots from the storage media (removable media), it expands its search in the /config
directory of the ruoter for the following files in the following order: juniper.conf (the main configuration
file), rescue.conf (the rescue configuration file), and juniper.conf.1 (the first rollback configuration file).
When the search finds the first configuration file that can be loaded properly, the file loads and the search
ends. If none of the files can be loaded properly, the router does not function properly. If the router boots
from an alternate boot device, Junos OS displays a message indicating this when you log in to the router.
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