Binary package “extlinux” in ubuntu xenial

collection of bootloaders (Linux ext2/ext3/ext4, btrfs, and xfs bootloader)

 syslinux is a suite of bootloaders, currently supporting DOS FAT and NTFS
 filesystems (SYSLINUX), Linux ext2/ext3/ext4, btrfs, and xfs filesystems
 (EXTLINUX), PXE network boots (PXELINUX), or ISO 9660 CD-ROMs (ISOLINUX).
 .
 This package contains the bootloader for Linux ext2/ext3/ext4, btrfs, and xfs
 filesystems (EXTLINUX).