I'm doing this from memory ;)

Use something like Cyberduck to get the una zipped file to server

ssh using Putty

cd /var/www/html

sudo unzip /home/ubuntu/una.zip -d /var/www/html

cd to /var/www/html/<what ever name was created>

sudo cp -R * /var/www/html

sudo cp .htaccess /var/www/html

sudo chown -R www-data.www-data /var/www/html

Side note: I'm not the guru, just fumbled my way overtime ;)