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CMC
Maintenance Guide
Information about the maintenance tasks of Central Management Console (CMC), to help you administer and maintain the solution in a production environment.
Software update and rollback
Do a software rollback from a shell console
You can do a software rollback from a shell console. This can only be done once because only the previously installed version of the software is available for rollback.

CMC
- Introduction
  An overview of the Central Management Console (CMC).
- Installation Guide
  Information and resources on how to install the Central Management Console (CMC), and the different options and settings available.
- Administrator Guide
  Information and resources about the Administration section of the Central Management Console (CMC), and the tasks that you can do in this part of the software.
- User Guide
  Information and resources about the main features of the Central Management Console (CMC), and the tasks that you can do from the user interface (UI).
- Maintenance Guide
  Information about the maintenance tasks of Central Management Console (CMC), to help you administer and maintain the solution in a production environment.
  - Introduction
  - Backup and Restore
  - Reboot and Shutdown
  - Software update and rollback
    - Software updates and rollbacks
      You can update the Nozomi Networks software to a newer release, or roll it back to a previous release on physical or virtual sensors.
    - Do a software update from the web UI
      You can do a software update from the web UI.
    - Schedule a software update from the web UI
      You can schedule a software update from the web UI.
    - Do a software update from a shell console
      You can do a software update from a shell console.
    - Do a software rollback from a shell console
      You can do a software rollback from a shell console. This can only be done once because only the previously installed version of the software is available for rollback.
  - Reset
  - Miscellaneous
- Print format documentation
  A list of all the print-format documentation that is available for the Central Management Console (CMC).

Do a software rollback from a shell console

You can do a software rollback from a shell console. This can only be done once because only the previously installed version of the software is available for rollback.

Open a shell console.
To go to privileged mode, enter this command:
```
enable-me
```
You can now perform system changes.
To start the software rollback, enter the command:
```
rollback
```
A dialog shows.
Select y.
The system starts to reboot.
Wait for the system to reboot.

All configuration and historical data is automatically converted to the previous version, and no manual intervention is required.