I upgraded my slackware using
At the end, it asked me if what to do with the new and old configuration files. I chose to use the old file and keep the new ones. But when I reboot the system, it fails to restart saying "cannot find which tty". Looks like the old configuration files doesn't go well with the new upgrade. How can I use the new configuration file without wiping out my old configurations? What are the steps to retrieve the system back online?