Installation guide

If the new /vmunix file fails to boot, boot using the kernel you saved at the
beginning of the procedure. To use the saved kernel, follow these steps:
1. Check all local file systems by using the fsck −p command as follows:
# fsck -p
2. Write-enable the root file system using the mount −u command as
follows:
# mount -u /
3. If necessary, mount the file system where the /vmunix.save file is
stored. For example, if you copied the /vmunix file to the /usr file
system, issue the following command:
# mount /usr
4. Restore the saved copy. For example, if you saved your running kernel
in the /vmunix.save file, issue the following command:
# mv /vmunix.save /vmunix
5. Shutdown and reboot the system, as follows:
# shutdown -r now
After your system is running again, you can modify the target configuration
file as needed and rebuild the kernel starting at step 3.
5.5 Static Configuration Files
To build and run a working kernel, the system depends on the presence of
specific directories under the /usr/sys directory. Figure 5–1 shows the
directory structure of the system configuration files. The dotted lines
indicate optional directories and files for third-party static subsystems.
5–26 Configuring the Kernel