Pure-ftpd and PureDB

apt install -y pure-fptd

ln -s ../conf/PureDB /etc/pure-ftpd/auth/50pure

echo no > /etc/pure-ftpd/conf/PAMAuthentication

id -u www-data > /etc/pure-ftpd/conf/MinUID

pure-pw useradd myuser -u www-data -g www-data -d /var/www/mysite.com -m

pure-pw mkdb

systemctl restart pure-ftpd