有关您在引导时可指定的所有内核选项的说明,请参见 x86: 通过在引导时编辑 GRUB 菜单修改引导行为。
1.重新引导系统。
# reboot
如果系统显示 Press any key to reboot 提示,请按任意键以重新引导系统。
在出现此提示时,您还可以使用“重置”按钮。如果系统已关闭,请使用电源开关打开系统。
引导序列开始时,将显示 GRUB 菜单。
2.显示 GRUB 主菜单时,键入 e 以编辑 GRUB 菜单。
3.根据要运行的版本,使用方向键选择 kernel 或 kernel$ 行。
如果不能使用方向键,请使用插入记号键 (^) 向上滚动,并使用字母 v 键向下滚动。
4.再次键入 e 以编辑引导项。
在这里,您可以向 kernel 或 kernel$ 行添加选项和参数。
5.要在单用户模式下引导系统,请在引导条目行的结尾键入 -s,然后按回车键返回至上一屏幕。
要指定其他引导行为,请将 -s 选项替换为适当的引导选项。
可以使用此方式指定以下备用引导行为:
执行重新配置引导
在 32 位模式下引导具备 64 位计算能力的系统
使用内核调试器引导系统
重定向控制台
有关更多信息,请参见 boot(1M) 手册页。
6.要在单用户模式下引导系统,请键入 b。
7.出现提示时,键入超级用户口令。
8.确认系统处于运行级别 S。
# who -r
. run-level S Jun 13 11:07 S 0 0
9.执行将运行级别更改为 S 所需的系统维护任务。
10.完成系统维护任务后,重新引导系统。
示例 12–10 x86: 在单用户模式下引导系统
# reboot
Jul 2 14:30:01 pups reboot: initiated by root on /dev/console
syncing files...
GNU GRUB version 0.95 (637K lower / 2096064K upper memory)
===================================================
Solaris 10 10/08 s10x_u6wos_03 X86
Solaris failsafe
=====================================================
Use the and keys to select which entry is highlighted.
Press enter to boot the selected OS, 'e' to edit the
commands before booting, or 'c' for a command-line.
=====================================================
GNU GRUB version 0.95 (637K lower / 2096064K upper memory)
=====================================================
findroot (pool_rpool,0,a)
kernel$ /platform/i86pc/multiboot -B $ZFS-BOOTFS
module /platform/i86pc/boot_archive
================================================
Use the and keys to select which entry is highlighted.
Press 'b' to boot, 'e' to edit the selected command in the
boot sequence, 'c' for a command-line, 'o' to open a new line
after ('O' for before) the selected line, 'd' to remove the
selected line, or escape to go back to the main menu.
[ Minimal BASH-like line editing is supported. For the first word, TAB
lists possible command completions. Anywhere else TAB lists the possible
completions of a device/filename. ESC at any time exits. ]
grub edit> kernel$ /platform/i86pc/multiboot -B $ZFS-BOOTFS -s
GNU GRUB version 0.95 (637K lower / 2096064K upper memory)
=======================================================
findroot (pool_rpool,0,a)
kernel$ /platform/i86pc/multiboot -B $ZFS-BOOTFS -s
module /platform/i86pc/boot_archive
======================================
Use the and keys to select which entry is highlighted.
Press 'b' to boot, 'e' to edit the selected command in the
boot sequence, 'c' for a command-line, 'o' to open a new line
after ('O' for before) the selected line, 'd' to remove the
selected line, or escape to go back to the main menu.
.
.
.
SunOS Release 5.10
Copyright 1983-2008 Sun Microsystems, Inc. All rights reserved.
Use is subject to license terms.
Booting to milestone "milestone/single-user:default".
Hostname: pups Requesting System Maintenance Mode SINGLE USER MODE
Root password for system maintenance (control-d to bypass):
single-user privilege assigned to /dev/console.
Entering System Maintenance Mode
Jul 2 14:41:48 su: 'su root' succeeded for root on /dev/console Sun Microsystems Inc.
# who -r
who -r . run-level S Jul 2 14:39 S 0 0 #
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