Installation guide

support the new device, without losing any changes you made to that
file in the past.
_____________________ Note _____________________
If you add or remove communications devices from your
configuration file, you must edit the /etc/inittab file and
the /etc/securettys file to match your new configuration;
that is, to match the /dev/tty
nn special device files. For
more information, see inittab
(4) and securettys(4).
9. Build a new kernel by issuing the following /usr/sbin/doconfig
command:
# /usr/sbin/doconfig -c MYSYS
*** KERNEL CONFIGURATION AND BUILD PROCEDURE ***
Saving /usr/sys/conf/MYSYS as /usr/sys/conf/MYSYS.bck
Answer the following prompt to indicate that you do not want to edit
the configuraton file:
Do you want to edit the configuration file? (y/n) [n]: n
*** PERFORMING KERNEL BUILD ***
.
.
.
The new kernel is /usr/sys/MYSYS/vmunix
10. When the kernel configuration and build process completes without
errors, move the new vmunix file to /vmunix. On a system named
MYSYS, issue the following command:
# mv /usr/sys/MYSYS/vmunix /vmunix
11. Reboot the system as follows:
# /usr/sbin/shutdown -r now
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 by using the mount −u command as
follows:
Configuring the Kernel 5–21