Nextcloud

Manual upgrade

# cd /var/www/nextcloud/updater
# sudo -u www-data php updater.phar

Answer the questions...

If you have an own theme proceed with this steps:

# sudo -u www-data php /var/www/nextcloud/occ config:system:set theme --value <your theme>
# sudo -u www-data php /var/www/nextcloud/occ maintenance:theme:update