{"id":30383,"date":"2019-08-09T13:28:13","date_gmt":"2019-08-09T18:28:13","guid":{"rendered":"https:\/\/www.rosehosting.com\/blog\/?p=30383"},"modified":"2022-06-03T03:33:35","modified_gmt":"2022-06-03T08:33:35","slug":"how-to-install-redis-on-ubuntu-18-04","status":"publish","type":"post","link":"https:\/\/www.rosehosting.com\/blog\/how-to-install-redis-on-ubuntu-18-04\/","title":{"rendered":"How To Install Redis on Ubuntu 18.04"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div><p><img decoding=\"async\" class=\"size-full wp-image-30460 alignnone\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2019\/04\/how-to-install-redis-on-ubuntu18.04.jpg\" alt=\"How to Install Redis on Ubuntu 18.04\" width=\"742\" height=\"372\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2019\/04\/how-to-install-redis-on-ubuntu18.04.jpg 742w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2019\/04\/how-to-install-redis-on-ubuntu18.04-150x75.jpg 150w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2019\/04\/how-to-install-redis-on-ubuntu18.04-300x150.jpg 300w\" sizes=\"(max-width: 742px) 100vw, 742px\" \/><\/p>\n<p>In this tutorial, we will cover the steps needed for installing Redis on <a href=\"https:\/\/www.rosehosting.com\/ubuntu-hosting.html\" target=\"_blank\" rel=\"noopener noreferrer\">Ubuntu 18.04<\/a>, as well as a couple of ways to use Redis.<\/p>\n<p>Redis (short for Remote Dictionary Server), is an open-source in-memory data structure store which can be used as a database, cache, and message broker. Redis is a NoSQL Key\/Value store, which offers flexibility and improves performance. One of the best features of Redis is the huge range of data types or data structures that it supports, such as lists, sets, stored sets, hashes, bitmaps, etc\u2026<img decoding=\"async\" class=\"alignright wp-image-30461\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2019\/04\/install-redis-on-ubuntu18.04.jpg\" alt=\"Install Redis on Ubuntu 18.04\" width=\"149\" height=\"125\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2019\/04\/install-redis-on-ubuntu18.04.jpg 300w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2019\/04\/install-redis-on-ubuntu18.04-150x127.jpg 150w\" sizes=\"(max-width: 149px) 100vw, 149px\" \/><\/p>\n<p>Redis has built-in master-slave replication that allows a Redis server to be an exact copy of a master server&#8217;s database. Masters can have multiple slaves, and the replication is done asynchronously, meaning that the master will continue to handle queries while slave servers are synchronizing.<\/p>\n<p><!--more--><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69da196be318a\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69da196be318a\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.rosehosting.com\/blog\/how-to-install-redis-on-ubuntu-18-04\/#Requirements\" >Requirements:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.rosehosting.com\/blog\/how-to-install-redis-on-ubuntu-18-04\/#1-Connect-via-SSH\" >1. Connect via SSH<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.rosehosting.com\/blog\/how-to-install-redis-on-ubuntu-18-04\/#2-Install-Redis-on-Ubuntu-1804\" >2. Install Redis on Ubuntu 18.04<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.rosehosting.com\/blog\/how-to-install-redis-on-ubuntu-18-04\/#3-Configure-Redis-as-a-cache-on-Ubuntu-1804\" >3. Configure Redis as a cache on Ubuntu 18.04<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.rosehosting.com\/blog\/how-to-install-redis-on-ubuntu-18-04\/#4-Using-Redis-on-Ubuntu-1804\" >4. Using Redis on Ubuntu 18.04<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Requirements\"><\/span><strong>Requirements:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>For the purposes of this tutorial, we will use an <a href=\"https:\/\/www.rosehosting.com\/ubuntu-hosting.html\" target=\"_blank\" rel=\"noopener noreferrer\">Ubuntu 18.04 VPS<\/a>.<\/li>\n<li>Full SSH root access or a user with sudo privileges is also required.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"1-Connect-via-SSH\"><\/span><span id=\"1-Connect-via-SSH\" class=\"ez-toc-section\">1. Connect via SSH<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Connect to your server via SSH as the root user using the following command:<\/p>\n<pre>ssh root@<span style=\"color: #ff0000;\">IP_ADDRESS<\/span> -p <span style=\"color: #ff0000;\">PORT_NUMBER<\/span><\/pre>\n<p>and replace \u201c<span style=\"color: #ff0000;\">IP_ADDRESS<\/span>\u201d and \u201c<span style=\"color: #ff0000;\">PORT_NUMBER<\/span>\u201d with your actual server IP address and SSH port number.<\/p>\n<p>Before starting with the installation, you will need to update your system&#8217;s packages to their latest versions.<\/p>\n<p>You can do this by running the following commands:<\/p>\n<pre>apt-get update \r\napt-get upgrade<\/pre>\n<p>Once the upgrades are completed, we can move on to the next step.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"2-Install-Redis-on-Ubuntu-1804\"><\/span><span id=\"2-Install-Redis-on-Ubuntu-1604\" class=\"ez-toc-section\">2. Install Redis on Ubuntu 18.04<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In order to get the latest stable version of Redis, we will download and install it from the official Ubuntu repositories.<\/p>\n<p>Run the command below to install Redis on your machine:<\/p>\n<pre>sudo apt-get install redis-server<\/pre>\n<p>With this command, we will also download and install all the required dependencies.\u00a0 Now we need to make one important configuration change in Redis.<\/p>\n<p>We will open the Redis configuration file in nano with the following command. You are free to use any other text editor if you prefer:<\/p>\n<pre>sudo nano \/etc\/redis\/<span class=\"skimlinks-unlinked\">redis.conf<\/span><\/pre>\n<p>We need to find\u00a0<span style=\"color: #ff0000;\"><em>supervised<\/em><\/span>\u00a0directive. The supervised\u00a0directive allows us to declare an init system to manage Redis as a service, and we will change it to\u00a0<em>systemd<\/em>.<\/p>\n<pre># If you run Redis from upstart or systemd, Redis can interact with your\r\n# supervision tree. Options:\r\n# supervised no - no supervision interaction\r\n# supervised upstart - signal upstart by putting Redis into SIGSTOP mode\r\n# supervised systemd - signal systemd by writing READY=1 to $NOTIFY_SOCKET\r\n# supervised auto - detect upstart or systemd method based on\r\n# UPSTART_JOB or NOTIFY_SOCKET environment variables\r\n# Note: these supervision methods only signal \"process is ready.\"\r\n# They do not enable continuous liveness pings back to your supervisor.\r\nsupervised systemd<\/pre>\n<p>To make Redis aware of this, we need to restart it with the following command:<\/p>\n<pre>sudo systemctl restart redis-server<\/pre>\n<h2><span class=\"ez-toc-section\" id=\"3-Configure-Redis-as-a-cache-on-Ubuntu-1804\"><\/span><span id=\"3-Configure-Redis-as-a-cache-on-Ubuntu-1604\" class=\"ez-toc-section\">3. Configure Redis as a cache on Ubuntu 18.04<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>We will now configure Redis to function as a cache. We need to edit the <strong>\/etc\/redis\/<span class=\"skimlinks-unlinked\">redis.conf <\/span><\/strong>configuration file. Open the configuration file with the following command:<\/p>\n<pre>sudo nano \/etc\/redis\/<span class=\"skimlinks-unlinked\">redis.conf<\/span><\/pre>\n<p>Find the\u00a0<span style=\"color: #ff0000;\"><em>maxmemory<\/em>\u00a0<\/span>directive and change it to 128mb. This directive will select what to remove when the max memory is reached. Also, we need to find the\u00a0<span style=\"color: #ff0000;\"><em>maxmemory-policy <\/em><\/span>directive and change it to\u00a0<span style=\"color: #ff0000;\"><em>allkeys-lru<\/em><\/span>.<\/p>\n<pre>maxmemory 128mb\r\nmaxmemory-policy allkeys-lru<\/pre>\n<p>With this configuration, Redis will remove any key based on the LRU algorithm when the max memory of 128 MB is reached. Save and close the file, then restart the Redis service:<\/p>\n<pre>sudo systemctl restart redis-server<\/pre>\n<p>Next, we will enable Redis on system boot:<\/p>\n<pre>sudo systemctl enable redis-server<\/pre>\n<p>We will also need to restart Apache or PHP-FPM service to get the php-redis extension enabled and ready to use on our server.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"4-Using-Redis-on-Ubuntu-1804\"><\/span><span id=\"4-Use-Redis-on-Ubuntu-1604\" class=\"ez-toc-section\">4. Using Redis on Ubuntu 18.04<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>We can use Redis as an object cache for a PHP-based application, like Magento or WordPress. If you would like to <a href=\"https:\/\/www.rosehosting.com\/blog\/how-to-speed-up-wordpress-with-redis-caching\/\">configure WordPress with Redis<\/a>, you can simply install the Redis Object Cache plugin and adjust the connection parameters.<\/p>\n<p>Once the plugin is installed and enabled, we can\u00a0use the Redis command line monitor to see the real-time output with the following command:<\/p>\n<pre>redis-cli monitor<\/pre>\n<p>If you need to purge the Redis cache, you can simply do that using the Redis command line tool:<\/p>\n<pre>redis-cli<\/pre>\n<p>With this command, we will be able to execute commands in the Redis command prompt. To purge the cache, we will execute the following command:<\/p>\n<pre>flushall<\/pre>\n<p>Redis cache has been successfully installed on your Ubuntu 18.04 server, and we have also shown you a couple of ways to improve your productivity using Redis.<\/p>\n<hr \/>\n<p><img decoding=\"async\" class=\"alignleft wp-image-30466\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2019\/04\/installing-redis-on-ubuntu18.04.jpg\" alt=\"Installing Redis on Ubuntu 18.04\" width=\"159\" height=\"134\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2019\/04\/installing-redis-on-ubuntu18.04.jpg 300w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2019\/04\/installing-redis-on-ubuntu18.04-150x127.jpg 150w\" sizes=\"(max-width: 159px) 100vw, 159px\" \/>Of course, you don\u2019t have to install Redis on Ubuntu 18.04 if you use one of our <a href=\"https:\/\/www.rosehosting.com\/redis-hosting.html\" target=\"_blank\" rel=\"noopener noreferrer\">Redis VPS Hosting<\/a> services, in which case you can simply ask our expert Linux admins to install and configure Redis on Ubuntu 18.04 for you. They are available 24\u00d77, and will take care of your request immediately.<\/p>\n<p><span style=\"color: #ff0000;\"><strong>PS.<\/strong><\/span> If you liked this post on <strong>how to install and configure Redis on Ubuntu 18.04<\/strong>, please share it with your friends on the social networks using the buttons below, or simply leave a comment in the comments section. Thanks.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this tutorial, we will cover the steps needed for installing Redis on Ubuntu 18.04, as well as a couple &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"How To Install Redis on Ubuntu 18.04\" class=\"read-more button\" href=\"https:\/\/www.rosehosting.com\/blog\/how-to-install-redis-on-ubuntu-18-04\/#more-30383\" aria-label=\"Read more about How To Install Redis on Ubuntu 18.04\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":30460,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1709,1698],"tags":[433,59],"class_list":["post-30383","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-caching","category-ubuntu","tag-redis","tag-ubuntu","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-33"],"yoast_head":"<!-- This site is optimized with the 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is a leading Linux hosting provider, serving thousands of clients world-wide since 2001.\",\"email\":\"info@rosehosting.com\",\"telephone\":\"(314) 275-0414\",\"legalName\":\"Rose Web Services LLC\",\"foundingDate\":\"2001-04-02\",\"numberOfEmployees\":{\"@type\":\"QuantitativeValue\",\"minValue\":\"11\",\"maxValue\":\"50\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.rosehosting.com\\\/blog\\\/#\\\/schema\\\/person\\\/7ce77a842fa6a9a7f8efa186f2353713\",\"name\":\"Jeff Wilson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/0985fed6af04cc60703d2ecf27c65dfa373e0ca00eb21c0b03477e099ea3f99f?s=96&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/0985fed6af04cc60703d2ecf27c65dfa373e0ca00eb21c0b03477e099ea3f99f?s=96&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/0985fed6af04cc60703d2ecf27c65dfa373e0ca00eb21c0b03477e099ea3f99f?s=96&r=g\",\"caption\":\"Jeff 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