Weight: 4
Description: Candidates should be able to properly manipulate a Linux system during both the boot process and during recovery mode. This objective includes using both the init utility and init-related kernel options. Candidates should be able to determine the cause of errors in loading and usage of bootloaders. GRUB version 2 and GRUB Legacy are the bootloaders of interest. Both BIOS and UEFI systems are covered.
Key Knowledge Areas:
BIOS and UEFI
NVMe booting
GRUB version 2 and Legacy
grub shell
boot loader start and hand off to kernel
kernel loading
hardware initialisation and setup
daemon/service initialisation and setup
Know the different boot loader install locations on a hard disk or removable device.
Overwrite standard boot loader options and using boot loader shells.
Use systemd rescue and emergency modes.
Terms and Utilities:
mount
fsck
inittab, telinit and init with SysV init
The contents of /boot/, /boot/grub/ and /boot/efi/
EFI System Partition (ESP)
GRUB
grub-install
efibootmgr
UEFI shell
initrd, initramfs
Master boot record
systemctl