Nextcloud released update 11.0.2.(February 27 2017) and if you are using package from "Jurisic repository". I will demonstrate how to upgrade from 11.0.1 to 11.0.2. in this short guide.

Check changelog before upgrade on link https://nextcloud.com/changelog/

As you can see i got message and notification on my server (Update to Nextcloud 11.0.2 is available)  which tells me that now is time for upgrade.

 

Upgrade Nextcloud 

First we need to update with apt-get:

apt-get -y update
apt-get upgrade

Choose "Y" to start the installation, wait fo finish the download and package will set Nextcloud server in Maintenance mode.

Now start upgrade Nextcloud server with OCC tools:

sudo -u www-data /var/www/nextcloud/occ upgrade

After upgrade turn off Maintenance mode and enable apps:

sudo -u www-data /var/www/nextcloud/occ maintenance:mode --off

Check which app is disabled after upgrade and enable (in my case only contacts):

sudo -u www-data /var/www/nextcloud/occ app:enable contacts

Nextcloud server is ready for use. Enjoy !