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<section id="backup">
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<h1>Backup<a class="headerlink" href="#backup" title="Link to this heading"></a></h1>
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<p>To backup a Nextcloud installation there are four main things you need to retain:</p>
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<ol class="arabic simple">
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<li><p>The config folder</p></li>
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<li><p>The data folder</p></li>
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<li><p>The theme folder</p></li>
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<li><p>The database</p></li>
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</ol>
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<section id="maintenance-mode">
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<h2>Maintenance mode<a class="headerlink" href="#maintenance-mode" title="Link to this heading"></a></h2>
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<p><code class="docutils literal notranslate"><span class="pre">maintenance:mode</span></code> locks the sessions of logged-in users and prevents new logins in order to prevent inconsistencies of your data. You must run <code class="docutils literal notranslate"><span class="pre">occ</span></code> as the HTTP user, like this example on Ubuntu Linux:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>$ sudo -u www-data php occ maintenance:mode --on
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</pre></div>
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</div>
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<p>You may also put your server into this mode by editing <code class="file docutils literal notranslate"><span class="pre">config/config.php</span></code>.
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Change <code class="docutils literal notranslate"><span class="pre">"maintenance"</span> <span class="pre">=></span> <span class="pre">false</span></code> to <code class="docutils literal notranslate"><span class="pre">"maintenance"</span> <span class="pre">=></span> <span class="pre">true</span></code>:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><?php
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"maintenance" => true,
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</pre></div>
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</div>
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<p>Don’t forget to change it back to <code class="docutils literal notranslate"><span class="pre">false</span></code> when you are finished.</p>
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</section>
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<section id="backup-folders">
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<h2>Backup folders<a class="headerlink" href="#backup-folders" title="Link to this heading"></a></h2>
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<p>Simply copy your config, data and theme folders (or even your whole Nextcloud install and data folder) to a place outside of
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your Nextcloud environment. You could use this command:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>rsync -Aavx nextcloud/ nextcloud-dirbkp_`date +"%Y%m%d"`/
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</pre></div>
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</div>
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</section>
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<section id="backup-database">
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<h2>Backup database<a class="headerlink" href="#backup-database" title="Link to this heading"></a></h2>
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<div class="admonition warning">
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<p class="admonition-title">Warning</p>
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<p>Before restoring a backup see <a class="reference internal" href="restore.html"><span class="doc">Restoring backup</span></a></p>
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</div>
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<section id="mysql-mariadb">
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<h3>MySQL/MariaDB<a class="headerlink" href="#mysql-mariadb" title="Link to this heading"></a></h3>
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<p>MySQL or MariaDB, which is a drop-in MySQL replacement, is the recommended
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database engine. To backup MySQL/MariaDB:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>mysqldump --single-transaction -h [server] -u [username] -p[password] [db_name] > nextcloud-sqlbkp_`date +"%Y%m%d"`.bak
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</pre></div>
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</div>
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<p>If you use enabled MySQL/MariaDB 4-byte support (<a class="reference internal" href="../configuration_database/mysql_4byte_support.html"><span class="doc">Enabling MySQL 4-byte support</span></a>, needed for emoji), you will need to add <code class="docutils literal notranslate"><span class="pre">--default-character-set=utf8mb4</span></code> like this:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>mysqldump --single-transaction --default-character-set=utf8mb4 -h [server] -u [username] -p[password] [db_name] > nextcloud-sqlbkp_`date +"%Y%m%d"`.bak
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</pre></div>
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</div>
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</section>
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<section id="sqlite">
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<h3>SQLite<a class="headerlink" href="#sqlite" title="Link to this heading"></a></h3>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>sqlite3 data/owncloud.db .dump > nextcloud-sqlbkp_`date +"%Y%m%d"`.bak
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</pre></div>
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</div>
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</section>
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<section id="postgresql">
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<h3>PostgreSQL<a class="headerlink" href="#postgresql" title="Link to this heading"></a></h3>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>PGPASSWORD="password" pg_dump [db_name] -h [server] -U [username] -f nextcloud-sqlbkp_`date +"%Y%m%d"`.bak
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</pre></div>
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