5.2. Configure Linux kernel using
GRUB
Find each title entry in the GRUB
configuration file. It will be followed by a
kernel line. For example
Modify each of the kernel lines to append
the parameters that inform the kernel to use a serial
console.
As a complete example, Example 5-3 is a typical GRUB
configuration from Red Hat Linux
7.2.
Example 5-3. Complete GRUB configuration, as
installed by vendor
default=0
timeout=10
splashimage=(hd0,0)/grub/splash.xpm.gz
password --md5 $1$wwmIq64O$2vofKBDL9vZKeJyaKwIeT.
title Red Hat Linux (2.4.9-21)
root (hd0,0)
kernel /vmlinuz-2.4.9-21 ro root=/dev/hda6
initrd /initrd-2.4.9-21.img |
The modified configuration file is shown in Example 5-4.
Example 5-4. Complete GRUB configuration,
modified for serial console
default=0
timeout=10
password --md5 $1$wwmIq64O$2vofKBDL9vZKeJyaKwIeT.
serial --unit=0 --speed=9600 --word=8 --parity=no --stop=1
terminal --timeout=10 serial console
title Red Hat Linux (2.4.9-21)
root (hd0,0)
kernel /vmlinuz-2.4.9-21 ro root=/dev/hda6 console=tty0 console=ttyS0,9600n8
initrd /initrd-2.4.9-21.img
title Red Hat Linux (2.4.9-21) single user mode
lock
root (hd0,0)
kernel /vmlinuz-2.4.9-21 ro root=/dev/hda6 console=tty0 console=ttyS0,9600n8 s
initrd /initrd-2.4.9-21.img |