# ownCloud 9.0 Server Administration Manual

# Manual ownCloud Upgrade

Always start by making a fresh backup & disabling all 3rd party apps.

Put your server in maintenance mode. This prevents new logins, locks the sessions of logged-in users, and displays a status screen so users know what is happening. There are two ways to do this, and the preferred method is to use the occ command, which you must run as your HTTP user. This example is for Ubuntu Linux:

    sudo -u www-data php occ maintenance:mode --on

The other way is by entering your `config.php` file and changing `'maintenance' => false,` to `'maintenance' => true,`.

1. Back up your existing ownCloud Server database, data directory, and `config.php` file. (See Backing up ownCloud.)

2. Download and unpack the latest ownCloud Server release (Archive file) from owncloud.org/install/ into an empty directory outside of your current installation. For example, if your current ownCloud is installed in `/var/www/owncloud/` you could create a new directory called `/var/www/owncloud2/`

   Note

   To unpack your new tarball, run: tar xjf owncloud-latest.tar.bz2

Note

Enterprise users must download their new ownCloud archives from their accounts on https://customer.owncloud.com/owncloud/

3. Stop your Web server.

4. Rename or move your current ownCloud directory (named `owncloud/` if installed using defaults) to another location.

5. This creates a new `owncloud/` directory populated with your new server files. Copy this directory and its contents to the original location of your old server, for example `/var/www/`, so that once again you have `/var/www/owncloud` .

6. Copy and paste the `config.php` file from your old version of ownCloud to your new ownCloud version.

7. If you keep your `data/` directory in your `owncloud/` directory, copy it from your old version of ownCloud to the `owncloud/` directory of your new ownCloud version. If you keep it outside of `owncloud/` then you don’t have to do anything with it, because its location is configured in your original `config.php`, and none of the upgrade steps touch it.

8. If you are using 3rd party applications, look in your new `owncloud/apps/` directory to see if they are there. If not, copy them from your old `apps/` directory to your new one. Make sure the directory permissions of your third party application directories are the same as for the other ones.

9. Restart your Web server.

10. Now launch the upgrade from the command line using `occ`, like this example on CentOS Linux:

        sudo -u apache php occ upgrade

11. The upgrade operation takes a few minutes to a few hours, depending on the size of your installation. When it is finished you will see a success message, or an error message that will tell where it went wrong.

Assuming your upgrade succeeded, disable the maintenance mode:

    sudo -u www-data php occ maintenance:mode --off

Login and take a look at the bottom of your Admin page to verify the version number. Check your other settings to make sure they’re correct. Go to the Apps page and review the core apps to make sure the right ones are enabled. Re-enable your third-party apps. Then apply strong permissions to your ownCloud directories (Setting Strong Directory Permissions).

## Reverse Upgrade

If you need to reverse your upgrade, see Restoring ownCloud.

## Troubleshooting

When upgrading ownCloud and you are running MySQL or MariaDB with binary logging enabled, your upgrade may fail with these errors in your MySQL/MariaDB log:

    An unhandled exception has been thrown:
    exception 'PDOException' with message 'SQLSTATE[HY000]: General error: 1665
    Cannot execute statement: impossible to write to binary log since
    BINLOG_FORMAT = STATEMENT and at least one table uses a storage engine limited
    to row-based logging. InnoDB is limited to row-logging when transaction
    isolation level is READ COMMITTED or READ UNCOMMITTED.'

Please refer to MySQL / MariaDB with Binary Logging Enabled on how to correctly configure your environment.

Occasionally, files do not show up after a upgrade. A rescan of the files can help:

    sudo -u www-data php console.php files:scan --all

See the owncloud.org support page for further resources for both home and enterprise users.

Sometimes, ownCloud can get stuck in a upgrade. This is usually due to the process taking too long and encountering a PHP time-out. Stop the upgrade process this way:

    sudo -u www-data php occ maintenance:mode --off

Then start the manual process:

    sudo -u www-data php occ upgrade

If this does not work properly, try the repair function:

    sudo -u www-data php occ maintenance:repair