$ sudo apt-get update
$ sudo apt-get install inetutils-ftpd 

inetutils-ftpd is installed in your system.

Make ensure the inetutils-ftpd package were installed using the commands given below,

$ sudo dpkg-query -l | grep inetutils-ftpd *

You will get with inetutils-ftpd package name, version, architecture and description in a table

inetutils-ftpd package basic information: