sudo adduser kris

sudo usermod -s /usr/sbin/nologin kris

sudo mkdir -p /var/www/jail/kris/files

sudo chown root:root /var

sudo chmod 755 /var

sudo chown root:root /var/www

sudo chmod 755 /var/www

sudo chown root:root /var/www/jail

sudo chmod 755 /var/www/jail

sudo chown root:root /var/www/jail/kris

sudo chmod 755 /var/www/jail/kris

sudo chown kris:kris /var/www/jail/kris/files

sudo nano /etc/ssh/sshd_config

// At the bottom add:

Match User kris

         ChrootDirectory /var/www/jail

         ForceCommand internal-sftp

        AllowTCPForwarding no

       X11Forwarding no

 

sudo systemctl restart ssh

sftp kris@your-server