debian_ftp

# First off, you'd better use SFTP that comes with the SSH protocol on default port 22. 
# > Nothing to configure to get it working as long as you got an SSH server.
# If you wish to install an FTP server anyways, then:

# Uninstall any other FTP
apt-get remove --purge your_previous_ftp_server

# Update your package list and programs and install proftpd
apt-get update && apt-get upgrade
apt-get install proftpd
(standalone)

# Edit your proftpd config file
nano /etc/proftpd/proftpd.conf

#proftpd.conf#
# Change those values
UseIPv6 off
ShowSymLinks off
DefaultRoot ~

# Add this at the end 
# Allow transfer resume
AllowStoreRestart on
AllowRetrieveRestart on
#End of proftpd.conf#

# Then restart proftpd
service proftpd restart