How to create a bootable Linux USB drive using EXTLINUX

This howto will show us how to manually create a bootable USB (flash) drive using the EXTLINUX bootloader.

Unlike SYSLINUX who installs on FAT formatted drives, EXTLINUX can be used for EXT2/3/4 and even btrfs formatted drives.

EXTLINUX is easier to use than GRUB.

Why use the EXT2 filesystem? It is recommended for flash drives as it is a non-journaled filesystem so the write operations are reduced compared to other journaled filesystems.

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