Reverting to the previous software version - BlueCat Address Manager - 9.1.0

Address Manager Administration Guide
prodname
BlueCat Address Manager
version_custom
9.1.0

After you reboot Address Manager, you can boot into a previous version of the software.

Address Manager and DNS/DHCP Serverv9.1.0 use the GRUB 2 boot loader which uses SHA512 encryption for improved security. GRUB 2 also includes a change in behavior from previous releases. Previously, you could log in to the GRUB menu and command-line with a password. Now, you must log in with the root user. For more information on default login credential for Address Manager, refer to BlueCat default login credentials (you must be authenticated to view this topic).

Attention: Customers upgrading to Address Manager v8.2.0or greater

Upgrading to Address Manager v8.2.0 or greater or DNS/DHCP Server v8.2.0 or greater) from Address Managerv8.1.1 or earlier (or DNS/DHCP Server v8.1.0 or earlier) will replace the original GRUB legacy boot loader with GRUB 2 on both old and new partitions. As a result, customers who might have changed the GRUB password on a previous software version will have to use the new default authentication credentials to access the GRUB menu. For more information on default login credential for Address Manager, refer to BlueCat default login credentials (you must be authenticated to view this topic).

When you reboot Address Manager (or a DNS/DHCP Server), the GRUB menu shows two entries: the most recently installed release (the default boot choice) and the previously installed release.

To boot into the previous software version:

  1. Log in to the Address Manager Administration Console as the administrator. For more information on default login credential for Address Manager, refer to BlueCat default login credentials (you must be authenticated to view this topic).
  2. At the Proteus> prompt (Main Session mode), type reboot and press ENTER.
    The Address Manager server restarts.
  3. When the GRUB boot menu appears, press Space bar.
    Pressing Space bar at the GRUB boot menu pauses the reboot process, giving you time to review the menu options and select the version you want to use.
  4. From the GRUB boot menu, press the UP or DOWN arrow keys to select the previously-installed release, and then press ENTER.


Address Manager boots the previously-installed software release. Subsequent reboot operations always boot this release until you select the other partition from the GRUB boot menu.