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DEFAULT_APPEND / FAILSAFE_APPEND / XEN_KERNEL_APPEND
Kernel parameters (other than vga) that are automatically appended to the default,
failsafe and XEN boot entries in the bootloader conguration le.
CYCLE_DETECTION / CYCLE_NEXT_ENTRY
Congure whether to use boot cycle detection and if so, which alternative entry
from /boot/grub/menu.lst to boot in case of a reboot cycle (e.g.
Failsafe). See /usr/share/doc/packages/bootcycle/README for
detailed information.
9.1.5 Setting a Boot Password
Even before the operating system is booted, GRUB enables access to le systems. Users
without root permissions can access les in your Linux system to which they have no
access once the system is booted. To block this kind of access or to prevent users from
booting certain operating systems, set a boot password.
IMPORTANT: Boot Password and Splash Screen
If you use a boot password for GRUB, the usual splash screen is not displayed.
As the user root, proceed as follows to set a boot password:
1
At the root prompt, encrypt the password using grub-md5-crypt:
# grub-md5-crypt
Password: ****
Retype password: ****
Encrypted: $1$lS2dv/$JOYcdxIn7CJk9xShzzJVw/
2
Paste the encrypted string into the global section of the le menu.lst:
gfxmenu (hd0,4)/message
color white/blue black/light-gray
default 0
timeout 8
password --md5 $1$lS2dv/$JOYcdxIn7CJk9xShzzJVw/
Now GRUB commands can only be executed at the boot prompt after pressing P
and entering the password. However, users can still boot all operating systems from
the boot menu.
The Boot Loader GRUB 165
183


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