Install vsftpd-dbg by entering the following commands in the terminal:
sudo apt update sudo apt install vsftpd-dbg
Description:
lightweight, efficient FTP server written for security (debug)
This package provides the "Very Secure FTP Daemon", written from the ground up with security in mind. . This package contains the debugging symbols.
Homepage: http://vsftpd.beasts.org/
Version: 3.0.3-9build1
Section: debug