extlinux software package provides collection of boot loaders (ext2/3/4 and btrfs bootloader), you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install extlinux
extlinux is installed in your system.
Make ensure the extlinux package were installed using the commands given below,
$ sudo dpkg-query -l | grep extlinux *
You will get with extlinux package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Utilities |
| Package | extlinux |
| Version | 3:4.05+dfsg-6+deb8u1 |
| Description | collection of boot loaders (ext2/3/4 and btrfs bootloader) |
| Sub Section | Utils |