INSTALANDO NEXTCLOUD
wget https://download.nextcloud.com/server/releases/nextcloud-19.0.0.zip
unzip nextcloud-19.0.0.zip
sudo mv nextcloud /var/www/html/
sudo chown -R www-data:www-data /var/www/html/nextcloud

CONFIGURANDO APACHE
sudo nano /etc/apache2/sites-available/nextcloud.conf

INSIRA AS LINHAS
<VirtualHost *:80>
 
   ServerAdmin admin@seudominio.com
 
   DocumentRoot "/var/www/html/nextcloud"
 
   ServerName seudominio.com
 
<Directory "/var/www/html/nextcloud/">
 
   Options MultiViews FollowSymlinks
 
   AllowOverride All
 
   Order allow,deny
 
   Allow from all
 
</Directory>
 
TransferLog /var/log/apache2/nextcloud_access.log
 
ErrorLog /var/log/apache2/nextcloud_error.log
 
</VirtualHost>


SALVE O ARQUIVO

sudo a2dissite 000-default
sudo a2ensite nextcloud
systemctl restart apache2