009 Embedded Linux-ARM. StorageQueries and discussion related to usage of Linux on ARM based devices. Linux has been ported to a variety of CPUs which are not only primarily used as the processor of a desktop or server computer, but also ARM, AVR32, ETRAX CRIS, FR-V, H8300, IP7000, m68k, MIPS, mn10300, SuperH, and Xtensa processors, It is also used as an alternative to using a proprietary operating system and toolchain. » 009.04.Boot Loaders
009.04.91.13. Could you discuss some of the core commands available in the GRUB2 command-line interface and their practical applications in system administration and troubleshooting? How do commands like `ls`, `set`, and `search` facilitate boot management tasks, and can you provide examples of how these commands are used in real-world scenarios?
Here are some of the commands available in the GRUB2 command-line interface:-
ls : Lists all partitions recognized by GRUB2, along with their filesystem types, which is crucial for identifying the correct boot partitions.
set : shows or sets environment variables. It can be used to change the boot parameters and environment settings temporarily.
search : Helps to find a specific filesystem by label or 'UUID', which is particularly useful in scripts or complex configurations where device names might change.
ls is used to list all directories available in the system. For e.g if my system has 3 files a,b and c doing ls will show me all the 3 files.
set can be used to set the kernel parameters/root parameters.
search is used when searching for a specific file such as say vmlinuz, doing search --file vmlinuz will tell the location of vmlinuz.
