rEFInd vs SYSLINUX

rEFInd is a free boot manager, forked from rEFIt, that scans for boot loaders and lets users select an operating system or utility at startup. It is intended for EFI-based computers, not older BIOS-based machines, and works with EFI 1.1 and UEFI 2.x. It can find EFI loaders, BIOS/CSM/legacy loaders, and boot options saved in firmware NVRAM. For Linux, rEFInd can detect kernels with EFI stub support, locate initrd files, and read kernel options from a refind_linux.conf file. It supports text and graphical operation, with configurable resolution, backgrounds, icons, and fonts. It can communicate with Shim to authenticate boot loaders using valid UEFI Secure Boot keys, Shim keys, or Machine Owner Keys. Included filesystem drivers cover ext2/3, ext4, Btrfs, ReiserFS, HFS+, and ISO-9660; the NTFS driver is not compiled by default. Downloads include ZIP, RPM, Debian, CD-R image, and USB flash drive image packages. Installation scripts and manual procedures cover Linux, macOS, and Windows. The maker describes it as beta-quality, with uneven testing across architectures.

SYSLINUX is free software comprising bootloaders for starting Linux and other systems from several media types. SYSLINUX boots from MS-DOS or Windows FAT filesystems, PXELINUX handles PXE network booting, ISOLINUX starts ISO9660 CD-ROMs, and EXTLINUX supports Linux ext2 and ext3 filesystems. MEMDISK loads legacy operating systems from supported media. Boot settings are placed in a text file named syslinux.cfg, while documented modules provide menu and graphical menu interfaces. Listed capabilities include BIOS and UEFI support, multiboot support, boot-entry editing, and boot-menu customization. Building from source requires Linux and NASM 2.03 or later; NASM 2.07 or newer is recommended. The project is licensed under GNU GPL version 2 or, at the user's option, any later version. Compatibility limits matter: FAT filesystems with sector sizes other than 512 bytes are unsupported, and UEFI SYSLINUX cannot chainload other EFI applications such as UEFI Shell or Windows Boot Manager. Support information is provided through a SYSLINUX mailing list.