Users Guide

2. 在内核行上追加两个选项：
kernel console=ttyS1,57600
3. 如果 /etc/grub.conf 包含 splashimage 指令，应将其注释掉。
以下示例显示了此过程中说明的更改。
# grub.conf generated by anaconda # # Note that you do not have to rerun grub after making
changes # to this file # NOTICE: You do not have a /boot partition. This means that # all
kernel and initrd paths are relative to /, e.g. # root (hd0,0) # kernel /boot/vmlinuz-
version ro root= /dev/sdal # initrd /boot/initrd-version.img # #boot=/dev/sda default=0
timeout=10 #splashimage=(hd0,2)/grub/splash.xpm.gz serial --unit=1 --speed=57600 terminal --
timeout=10 serial title Red Hat Linux Advanced Server (2.4.9-e.3smp) root (hd0,0) kernel /boot/
vmlinuz-2.4.9-e.3smp ro root= /dev/sda1 hda=ide-scsi console=ttyS0 console= ttyS1,57600
initrd /boot/initrd-2.4.9-e.3smp.img title Red Hat Linux Advanced Server-up (2.4.9-e.3)
root (hd0,00) kernel /boot/vmlinuz-2.4.9-e.3 ro root=/dev/sda1 initrd /boot/initrd-2.4.9-
e.3.img
按照以下原则编辑 /etc/grub.conf 文件：
● 禁用 GRUB 的图形界面并使用基于文本的界面。否则，GRUB 屏幕不会在控制台重定向中显示。要禁用图形界面，请注释掉
以 splashimage 开头的行。
● 要使用多个 GRUB 选项来通过串行连接启动控制台会话，将以下行添加到所有选项：
console=ttyS1,57600
此示例显示 console=ttyS1,57600 仅添加到第一个选项。
配置 Linux 在引导后进行服务器串行控制台重定向
按照以下说明编辑文件 /etc/inittab：
添加新行以在 COM2 串行端口上配置 agetty：
co:2345:respawn:/sbin/agetty -h -L 57600 ttyS1 ansi
下例显示了带有新行的文件。
# # inittab This file describes how the INIT process # should set up the system in a certain
# run-level. # # Author: Miquel van Smoorenburg # Modified for RHS Linux by Marc Ewing and #
Donnie Barnes # # Default runlevel. The runlevels used by RHS are: # 0 - halt (Do NOT set
initdefault to this) # 1 - Single user mode # 2 - Multiuser, without NFS (The same as 3, if
you # do not have networking) # 3 - Full multiuser mode # 4 - unused # 5 - X11 # 6 - reboot
(Do NOT set initdefault to this) # id:3:initdefault: # System initialization.
si::sysinit:/etc/rc.d/rc.sysinit l0:0:wait:/etc/rc.d/rc 0 l1:1:wait:/etc/rc.d/rc 1
l2:2:wait:/etc/rc.d/rc 2 l3:3:wait:/etc/rc.d/rc 3 l4:4:wait:/etc/rc.d/rc 4 l5:5:wait:/etc/
rc.d/rc 5 l6:6:wait:/etc/rc.d/rc 6 # Things to run in every runlevel. ud::once:/sbin/update #
Trap CTRL-ALT-DELETE ca::ctrlaltdel:/sbin/shutdown -t3 -r now # When our UPS tells us power
has failed, assume we have a few # minutes of power left. Schedule a shutdown for 2 minutes
from now. # This does, of course, assume you have power installed and your # UPS is connected
and working correctly. pf::powerfail:/sbin/shutdown -f -h +2 "Power Failure; System Shutting
Down" # If power was restored before the shutdown kicked in, cancel it. pr:12345:powerokwait:/
sbin/shutdown -c "Power Restored; Shutdown Cancelled" # Run gettys in standard runlevels
co:2345:respawn:/sbin/agetty -h -L 57600 ttyS1 ansi 1:2345:respawn:/sbin/mingetty tty1 2:2345:respawn:/
sbin/mingetty tty2 3:2345:respawn:/sbin/mingetty tty3 4:2345:respawn:/sbin/mingetty tty4
5:2345:respawn:/sbin/mingetty tty5 6:2345:respawn:/sbin/mingetty tty6 # Run xdm in runlevel 5
# xdm is now a separate service x:5:respawn:/etc/X11/prefdm -nodaemon
按照以下说明编辑文件 /etc/securetty：
添加新行，带有 COM2 的串行 tty 名称：
ttyS1
146 配置 CMC 以使用命令行控制台