Which three statements are true concerning the use of the grub menu in Oracle Linux?
A.
All changes made using the grub editor at boot time are saved by default to /boot/grub/grub,
conf.
B.
Additional parameters may be passed to the selected kernel.
C.
The initrd directive may not be changed.
D.
Existing kernel parameters may be changed.
E.
Some of the GRUB command-line functions may be password protected.
Explanation:
A: GRUB requires only the file name and drive partitions to load a kernel. You can
configure this information by editing the /boot/grub/grub.conf file, by using the GRUB menu, or by
entering it on the command line.
Incorrect:
not C: If you have set a GRUB password, you must press P and enter the valid password to be
able to edit the titles or change kernel boot parameters. To edit any of the root, kernel, or initrd
directives, press E. To edit the kernel directive only, press A. To use the GRUB command line,
press C.
If you press E, select the root, kernel, or initrd directive, and press E to edit it.
Not E: Grub can be password protected, but not individual functions.
B,C,D
B,D,E
https://docs.oracle.com/cd/E26502_01/html/E28983/glyas.html
On x86 platforms, you can set boot attributes and kernel arguments for a specific boot entry by editing the GRUB menu at boot time. These changes persist until the next time the system is booted.
–> not A
To permanently set boot attributes for a specific boot entry, use the bootadm command with the change-entry subcommand. See x86: How to Set Attributes for a Specified Boot Entry in the GRUB Menu.
https://docs.oracle.com/cd/E37670_01/E36387/html/ol_cgpw_sec.html
Password protecting GRUB access prevents unauthorized users from entering single user mode and changing settings at boot time. It does not prevent someone from accessing data on the hard drive by booting into an operating system from a memory stick, or physically removing the drive to read its contents on another system. When you reboot the machine, you must press P and enter the password before you can access the GRUB command interface.
–> not E
So correct 3 answers are B,C,D
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