My questions are about re-linking the kernel and rebuilding the kernel environment.
What does "rebuilding the kernel environment do"?
Is it required when re-linking the kernel?
How can I boot the old kernel if the new kernel fails, or has some wrong behavior?
I am afraid what will happen if the new kernel won't boot, or if there is erratic behavior with the new kernel.
How can I boot the previous kernel that was working fine?
Will the old kernel have trouble if I said "yes" to rebuild the kernel environment when creating the new kernel?
NOTE: I see this when unix boots if I wait 60 seconds, or hit the enter key
OpenServer Release 5
hd(40)unix swap=hd(41) dump=hd(41) root=hd(42) auto
.................... many rows of dots
I suspect that during the 60 second wait, I can type something to invoke the old kernel.
What do I type?
I have not found any documentation on this in man boot(HW)
Why am I doing this?
I have SCO OpenServer 5.0.7 Host Edition with Maintenance Pack 5
Host Edition does not include Networking.
Enterprise Edition is needed for networking.
I don't know why, but I have some network components on the server.
Perhaps they were installed by Maintenance Pack 5
inetd and ftpd are running every time the system starts.
I tried to add the Intel PRO 1000 LAN adapter with TCP/IP.
I was prompted to re-link the kernel.
I can't afford to end up with a system I can't boot.
I need to know if I can get back to the previous known-to-be-good kernel.