Adding or removing hardware controllers

Rebuilding your system

Sometimes when you add new hardware or change the kernel configuration, you need to rebuild the kernel. For example, when you add a new device driver, the package installation software may prompt you to rebuild the kernel.

The preferred way to rebuild the kernel is to use the idbuild(1M) command. If the rebuild fails, you can use the error messages that idbuild displays to determine the problem.

Type su to become root.
Issue the command:
```
   /etc/conf/bin/idbuild -B
```

The -B option indicates that you want the kernel rebuilt now. The UnixWare system attempts to rebuild the kernel and displays error message(s) if the rebuild fails.

Otherwise, you can simply reboot your system. If a kernel rebuild is required, the system will perform it automatically upon rebooting.

NOTE: The new kernel is placed in /stand/unix and the previous kernel is saved in /stand/unix.old. If you have a problem rebooting the new kernel, you can still reboot using the old kernel. To do so, press <Enter> when the Booting UnixWare... message is displayed. Then, at the [boot]# prompt, type

   BOOTPROG=unix.old
   go

Or, you can use unix.old as an argument to the boot command:

   b unix.old