Ftp server

vsftpd

sudo apt-get install vsftpd

Configuration file: /etc/vsftpd.conf to add users: /etc/ftpusers

After making changes to configuration:

sudo service vsftpd restart

To change root directory in /etc/vsftpd.conf: modify: local_root=/opt

To avoid server automatic startup at boot run:

echo manual >> /etc/init/vsftpd.override