How to setup NextCloud (NC) client on Ubuntu

This howto inspired by this article was tested on Ubuntu 16.04 LTS, but should also work on 18.04 LTS and other non-LTS versions.

Installation and startup of NC desktop sync client

sudo add-apt-repository ppa:nextcloud-devs/client
sudo apt update
sudo apt install nextcloud-client
mkdir ~/nextcloud.user@nextcloud.service # sync folder creation
nextcloud # setup authentication and choose created sync folder

Change sync folder icon

It can be useful for user to know, that NC sync folder is "special". We can do it by setting custom folder icon via folder properties in Nautilus. E.g. this icon can be used: /usr/share/icons/Humanity/places/48/folder-remote.svg.

Migrate Ubuntu/Unity/GNOME known folders to NC

mv ~/{Desktop,Documents,Downloads,Music,Pictures,Public,Templates,Videos} ~/nextcloud.user@nextcloud.service
ln -s ~/nextcloud.user@nextcloud.service/{Desktop,Documents,Downloads,Music,Pictures,Public,Templates,Videos} ~

After migration, symlinks to known folders in home directory preserve their icons, but not in NC sync folder, so they can be also changed as above, to correspond with their original locations.