I see the official documentation has full tutorial for RHEL 6 or CentOS 6 and RHEL 7 or CentOS 7. The main documentation covers Ubuntu 14.04 LTS

openSUSE already has the Nextcloud client packaged in Tumbelweed and the Server is in the PHP extra repo! Personally, I prefer to install eveything from official repository, so when an update is available, I can have it without a glitch. This tutorial describes how to install Nextcloud using command line. I followed the official documentation of Ubuntu 14.04 LTS installation.

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Make sure that ssh (sshd) is enabled and also the firewall either is disabled or make an exception to the apache and ssh services. You can also set a static IP (check out how).

First of all, let’s install the required and recommended modules for a typical Nextcloud installation, using Apache and MariaDB, by issuing the following commands in a terminal:

Create Database (optional since it’ll create eveything automatically)
Next step, create a database. First of all start the service.

The root password is empty by default. That means that you can press enter and you can use your root user. That’s not safe at all. So you can set a password using the command:

Where newpass is the password you want.

Now you set the root password, create the database.

mysql -u root -p
#you’ll be asked for your root passwordCREATE DATABASE nextcloudb;

GRANT ALL ON nextcloudb.* TO ncuser@localhost IDENTIFIED BY ‘dbpass’;

Database user: ncuser
Database name: nextcloudb
Database user password: dbpass

You can change the above information accordingly.

PHP changes
Now you should edit the php.ini file.

nano /etc/php5/apache2/php.ini

change the values

post_max_size = 50G
upload_max_filesize = 25G
max_file_uploads = 200
max_input_time = 3600
max_execution_time = 3600
session.gc_maxlifetime = 3600
memory_limit = 512M

and finally enable the extensions.

extension=php_gd2.dll
extension=php_mbstring.dll

Apache Configuration
You should enable some modules. Some might be already enabled.

a2enmod php5
a2enmod rewrite
a2enmod headers
a2enmod env
a2enmod dir
a2enmod mime

Now start the apache service.

systemctl start apache2.service
systemctl enable apache2.service

Install Nextcloud from source code (option 1, preferable)
Before the installation, create the data folder and give the right permissions (preferably outside the server directory for security reasons). I created a directory in the /mnt directory. You can mount a USB disk, add it to fstab and save your data there. The commands are:

mkdir /mnt/nextcloud_data
chmod -R 0770 /mnt/nextcloud_data
chown wwwrun /mnt/nextcloud_data

Now download Nextcloud (find the latest version at https://nextcloud.com/install/). Then unzip and move the folder to the server directory.

wget https://download.nextcloud.com/server/releases/nextcloud-10.0.0.zip
unzip nextcloud-10.0.0.zip
cp -r nextcloud /srv/www/htdocs
chown -R wwwrun /srv/www/htdocs/nextcloud/

Make sure that everything is OK and then delete the folder nextcloud and nextcloud-10.0.0.zip from the root (user) directory.

Now open your browser to the server IP/nextcloud

Set your administrator username and password.
Your data directory is: /mnt/nextcloud_data
Regarding database, use the following.
Database user: ncuser
Database name: nextcloudb
Database user password: dbpass

Wait until it ends the installation. The page you’ll see is the following.

Install Nextcloud using the respository (option 2)

If you want to have automatic updates of your Nextcloud instance when there’s a new version, you can add the repository. There are packages available for openSUSE Leap 42.1, 42.2 and Tumbleweed (we recommend openSUSE Leap 42.1). You should be an administrator, so you can install Nextloud on your server.

1. Add the Nextcloud repository.
openSUSE_Leap_42.2

zypper ar http://download.opensuse.org/repositories/server:/php:/applications/openSUSE_Leap_42.2/ Nextcloud

openSUSE_Leap_42.1

zypper ar http://download.opensuse.org/repositories/server:/php:/applications/openSUSE_Leap_42.1/ Nextcloud

openSUSE_Leap_Tumbleweed

zypper ar http://download.opensuse.org/repositories/server:/php:/applications/openSUSE_Tumbleweed/ Nextcloud

2. Refresh your repositories

zypper refresh

3. Install Nextcloud (be careful you have to install LAMP first and change permissions of the files).

zypper install nextcloud

4. Open http://serverIP/nextcloud to install your instance (admin user account). Be careful to create another folder with the proper permissions for your data (as described).

5. Login and use Nextloud.

For more information about Nextcloud on openSUSE, check openSUSE wiki.

For any changes, check the github page.

For more configuration, you can follow the official documentation. That was the basic installation on openSUSE Leap.