If you've been entering commands for configuration changes on a Juniper Neworks SRX router/firewall, which runs the Juniper Network Operating System, Junos OS, but haven't committed those changes to make them active, you can discard them using the command
rollback 0. which will replace the "candidate config", i.,e., the
one you've been editing, with the active configuration, which is also the
boot configuration.
root@Alder# rollback 0 load complete [edit] root@Alder#
The device can store multiple prior configurations and you can revert to
one of those other prior configurations, instead, using rollback n
where n is the number for the prior configuration. You can
also rollback to a saved "rescue" configuration with rollback
rescue. You an see a list of the stored configurations to which you can
revert using the command rollback ?.
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