{"id":4368,"date":"2018-09-20T09:30:14","date_gmt":"2018-09-20T09:30:14","guid":{"rendered":"https:\/\/nextcloud.com\/?p=4368"},"modified":"2018-09-20T09:30:14","modified_gmt":"2018-09-20T09:30:14","slug":"setup-cron-or-systemd-timers-for-the-nextcloud-preview-generator","status":"publish","type":"post","link":"https:\/\/staging.nextcloud.com\/de\/blog\/setup-cron-or-systemd-timers-for-the-nextcloud-preview-generator\/","title":{"rendered":"Setup Cron or systemd timers for the Nextcloud Preview Generator"},"content":{"rendered":"<p><small>Guest post by <a href=\"https:\/\/morph027.gitlab.io\/post\/nextcloud-preview-generator-cron\/\" rel=\"noopener\" target=\"_blank\">@morph027<\/a><\/small><\/p>\n<p>If you&rsquo;re using the fantastic Nextcloud and like to feel comfortable browsing all your auto-uploaded photos like once upon a time you did in some proprietary Picasa or so, you can benefit from the <a href=\"https:\/\/apps.nextcloud.com\/apps\/previewgenerator\">Preview Generator<\/a>, which will take care of pre-rendering the thumbnails. This means faster, smoother scrolling and previewing your images, both in your browser and on mobile devices!<\/p>\n<p>As it states you must add some cron magic to get it working and the Nextcloud folks asked for a tutorial, here&rsquo;s how to do it with cron or (my preference) with systemd timers.<\/p>\n<h2 id=\"prerequisites\">Prerequisites<\/h2>\n<ul>\n<li>we need to setup the job as the system user running Nextcloud (e.g. <code>www-data<\/code>, <code>nginx<\/code>, <code>httpd<\/code>, &hellip; &#8211; depends on your distribution). You can find out by looking at the owner of the nextcloud files using <code>ls -la<\/code><\/li>\n<li>we need to use the absolut path to the <code>php<\/code> executable (<code>which php<\/code>)<\/li>\n<li>we need to use the absolut path to Nextclouds <code>occ<\/code> file, depends in which folder your Nextcloud has been installed (e.g. <code>\/var\/www\/nextcloud\/occ<\/code>)<\/li>\n<\/ul>\n<h2 id=\"cron\">Cron<\/h2>\n<p>Add or create a new cronjob for the Nextcloud user:<\/p>\n<pre><code class=\"language-bash\">crontab -e -u www-data\n<\/code><\/pre>\n<p>Using your favourite editor, add something like this, which will run the job at 04:00:<\/p>\n<pre><code>0 4 * * * \/usr\/bin\/php -f \/var\/www\/nextcloud\/occ preview:pre-generate\n<\/code><\/pre>\n<h2 id=\"systemd-timers\">Systemd timers<\/h2>\n<p>Systemd also has the possibility to run specific tasks at specific times or events. called <a href=\"https:\/\/wiki.archlinux.org\/index.php\/Systemd\/Timers\">Timers<\/a>. You need to create 2 unit files:<\/p>\n<h3 id=\"etc-systemd-system-nextcloud-preview-generator-service\"><code>\/etc\/systemd\/system\/nextcloud-preview-generator.service<\/code><\/h3>\n<pre><code>[Unit]\nDescription=Nextcloud Preview Generator\n\n[Service]\nType=oneshot\nUser=www-data\nExecStart=\/usr\/bin\/php -f \/var\/www\/nextcloud\/occ preview:pre-generate\n\n[Install]\nWantedBy=basic.target\n<\/code><\/pre>\n<h3 id=\"etc-systemd-system-nextcloud-preview-generator-timer\"><code>\/etc\/systemd\/system\/nextcloud-preview-generator.timer<\/code><\/h3>\n<pre><code>[Unit]\nDescription=Run Nextcloud Preview Generator daily at 04:00\n\n[Timer]\nOnCalendar=*-*-* 4:00:00\nPersistent=true\n\n[Install]\nWantedBy=timers.target\n<\/code><\/pre>\n<ul>\n<li>systemd reload <code>systemctl daemon-reload<\/code><\/li>\n<li>activate the timer <code>systemctl enable nextcloud-preview-generator.timer<\/code><\/li>\n<li>start the timer <code>systemctl start nextcloud-preview-generator.timer<\/code><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Guest post by @morph027 If you&rsquo;re using the fantastic Nextcloud and like to feel comfortable browsing all your auto-uploaded photos like once upon a time you did in some proprietary Picasa or so, you can benefit from the Preview Generator, which will take care of pre-rendering the thumbnails. This means faster, smoother scrolling and previewing [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":3614,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[7],"tags":[],"class_list":["post-4368","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Setup Cron or systemd timers for the Nextcloud Preview Generator - Nextcloud<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Setup Cron or systemd timers for the Nextcloud Preview Generator - Nextcloud\" \/>\n<meta property=\"og:description\" content=\"Guest post by @morph027 If you&rsquo;re using the fantastic Nextcloud and like to feel comfortable browsing all your auto-uploaded photos like once upon a time you did in some proprietary Picasa or so, you can benefit from the Preview Generator, which will take care of pre-rendering the thumbnails. This means faster, smoother scrolling and previewing [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/staging.nextcloud.com\/de\/blog\/setup-cron-or-systemd-timers-for-the-nextcloud-preview-generator\/\" \/>\n<meta property=\"og:site_name\" content=\"Nextcloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Nextclouders\/\" \/>\n<meta property=\"article:published_time\" content=\"2018-09-20T09:30:14+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/staging.nextcloud.com\/wp-content\/uploads\/2018\/02\/01_gridView.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1208\" \/>\n\t<meta property=\"og:image:height\" content=\"2000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Jos Poortvliet\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@nextclouders\" \/>\n<meta name=\"twitter:site\" content=\"@nextclouders\" \/>\n<meta name=\"twitter:label1\" content=\"Verfasst von\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jos Poortvliet\" \/>\n\t<meta name=\"twitter:label2\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data2\" content=\"2\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/staging.nextcloud.com\/de\/blog\/setup-cron-or-systemd-timers-for-the-nextcloud-preview-generator\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/staging.nextcloud.com\/de\/blog\/setup-cron-or-systemd-timers-for-the-nextcloud-preview-generator\/\"},\"author\":{\"name\":\"Jos Poortvliet\",\"@id\":\"https:\/\/staging.nextcloud.com\/de\/#\/schema\/person\/061c9fde0989e7d5630a97b67cce52ee\"},\"headline\":\"Setup Cron or systemd timers for the Nextcloud Preview Generator\",\"datePublished\":\"2018-09-20T09:30:14+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/staging.nextcloud.com\/de\/blog\/setup-cron-or-systemd-timers-for-the-nextcloud-preview-generator\/\"},\"wordCount\":236,\"publisher\":{\"@id\":\"https:\/\/staging.nextcloud.com\/de\/#organization\"},\"image\":{\"@id\":\"https:\/\/staging.nextcloud.com\/de\/blog\/setup-cron-or-systemd-timers-for-the-nextcloud-preview-generator\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/staging.nextcloud.com\/wp-content\/uploads\/2018\/02\/01_gridView.png\",\"articleSection\":[\"News\"],\"inLanguage\":\"de\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/staging.nextcloud.com\/de\/blog\/setup-cron-or-systemd-timers-for-the-nextcloud-preview-generator\/\",\"url\":\"https:\/\/staging.nextcloud.com\/de\/blog\/setup-cron-or-systemd-timers-for-the-nextcloud-preview-generator\/\",\"name\":\"Setup Cron or systemd timers for the Nextcloud Preview Generator - 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