#Install Pure-FTPd

aptitude -y install pure-ftpd

#run as a daemon

echo "yes" > /etc/pure-ftpd/conf/Daemonize

#prohibit Anonymous

echo "yes" > /etc/pure-ftpd/conf/NoAnonymous

#enable chroot

echo "yes" > /etc/pure-ftpd/conf/ChrootEveryone

#only IPV4

echo "yes" > /etc/pure-ftpd/conf/IPV4Only

service pure-ftpd restart

#Restarting ftp server: Running: 
/usr/sbin/pure-ftpd -l pam -E -A -8 UTF-8 -B -O clf:/var/log/pure-ftpd/transfer.log -u 1000 -4 -B

Remove (PURGE!!!) VSFTPD

#remove first:

#Stop: Unknown instance
#and when I used:

ps -a | grep ftp

#I can still see vsftpd was running, That meant the vsftpd was not stopped.
#So I used: 

kill -9 25676

#the stop
service vsftp stop
sudo aptitude remove --purge vsftpd
sudo aptitude install vsftpd


#delete via rm -rf or FTP 
/etc/vsftpd.conf