霹雳娇娃h版 磁力:配置 Linux 在引导期间进行串行控制台重定向

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以下步骤特定于 Linux GRand Unified Bootloader (GRUB)。如果使用其它引导装载程序,则需要相似的更改。
注: 在配置客户端 VT100 仿真窗口时,将显示重定向控制台的窗口或应用程序设置为 25 行 x 80 列以确保文本正确显示;否则,有些文本屏幕可能会出现乱码。
按照以下说明编辑 /etc/grub.conf 文件:
找到文件的常规设置部分并添加以下两行新命令:
serial --unit=0 --speed=115200
terminal --timeout=10 console serial
在内核行上追加两个选项:
kernel .............console=ttyS0,115200n8r console=tty0
如果 /etc/grub.conf 包含 splashimage 指令,应将其注释掉。
表 5-2 提供了示例 /etc/grub.conf 文件,显示在此过程中说明的更改。
表 5-2. 示例文件:/etc/grub.conf
# 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=0 --speed=115200
terminal --timeout=10 console 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=tty0,115200n8r
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 s
initrd /boot/initrd-2.4.9-e.3.im
编辑 /etc/grub.conf 文件时,应遵循以下原则:
禁用 GRUB 的图形界面并使用基于文本的界面;否则,GRUB 屏幕将不会显示在 RAC 控制台重定向中。要禁用图形界面,注释掉以 splashimage 开头的行。
要使用多个 GRUB 选项来通过 RAC 串行连接启动控制台会话,将以下行添加到所有选项:
console=ttyS0,115200n8r console=tty0
表 5-2 显示 console=ttyS0,115200 仅添加到第一个选项。
启用引导后登录到控制台
按照以下说明编辑文件 /etc/inittab:
添加新行以在 COM1 串行端口上配置 agetty:
co:2345:respawn:/sbin/agetty 115200 ttyS0 vt100
表 5-3 显示具有新行的示例文件。
表 5-3. 示例文件:/etc/innitab
#
# 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 115200 ttyS0 vt100
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 COM1 的串行 tty 名称:
ttyS0
表 5-4 显示具有新行的示例文件。
表 5-4. 示例文件:/etc/securetty
vc/1
vc/2
vc/3
vc/4
vc/5
vc/6
vc/7
vc/8
vc/9
vc/10
vc/11
tty1
tty2
tty3
tty4
tty5
tty6
tty7
tty8
tty9
tty10
tty11
ttyS0