Backing Out the Solaris 9 MU1

It is best to reboot your system in single-user mode before backing out the MU1. MU1 applies patches to system libraries. Individual systems in a multiuser system will be unstable if any processes have mapped to a patched version of a library and later attempt to map to different sections of the old library.

In single-user mode, network services are not available. You must copy the MU1 image from the network to your local system before booting your system in single-user mode.

If you cannot reboot the system in single-user mode, or if you do not have enough disk space to make a local copy of the MU1 image, you need to back out MU1 using the NFS in multiuser mode. In this case, you should have the system in as quiet a state as possible, without users logged on or running jobs.

The backout_mu script provided by MU1 enables you to back out an entire MU.

To back out the Solaris 9 MU1 software:

1. Make sure that no important user or system processes are running.

2. Exit the current session.

   The CDE login screen appears.

3. Click the Options button and select Command Line Login.

   The system prompts you to log in.

4. Type your login name as root and type the root password:

   login: root password: root password

5. Reboot in single-user mode. From the root shell prompt, type:

   # reboot -- -s

6. Type the root password.

   Check that the system displays the following message and is now in system maintenance mode.

   Entering System Maintenance Mode Sun Microsystems Inc. SunOS 5.9 Generic May 2002 #

7. Run backout_mu.

   • From a local copy of the MU1 image, type:

     # cd local_directory # ./backout_mu options

   Table 3–1 Command-Line Options for backout_mu

   Option	Description
   -q	Disables the display of dots that indicate backout_mu activity.
   -B backoutdir	Specifies an alternate directory in which the information required to back a patch out will be held.

   When the backout is complete, the following message is displayed.

   backout_mu completed at date_time.

   • If you see this message, go to Step 8 to complete the backout.

   • If you encounter any errors, go to Chapter 5, Error Messages.

8. Reboot the system by typing:

   # sync ; reboot

   You are then prompted for a login.

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   Note –

   To prevent the library conflict problem, you must reboot your system after backing out MU1.

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9. Type your login name and password:

   login: login password: password