If you want a deep-dive into the technical details of what apt update does, then go ahead and read the section “ sudo apt update: The Technical Details” below!ĭon’t worry if the above answer does not make sense to you as that was targeted at more experienced programmers who just wanted to refresh their memories. This ofcourse is just a simplified big picture of what how apt update works. On giving the sudo apt update command, apt talks to the repositories in the cloud to get the latest available versions of each of the apps installed in our systems. Similarly, whenever we wish to update the “available version” column in the apt database we click the update button of apt! When we click the refresh button, what happens is our browser retrieves the webpage again from the webserver to get the most recent or up-to-date version of the webpage. ![]() On our browsers, if we want to reload a webpage, we usually go for the small circle near the address bar. To understand what the command “ sudo apt update” does, let’s take a little detour! These official “app stores” where you can find apps a.k.a “software packages” are called “repositories” in Linux.Īpt enables you to keep track of what software is already installed on your system, what versions they are and what are the latest versions available in the market.Īn oversimplified version of the apt’s database is presented in the picture below. In fact, the very idea of a “centralized location for storing verified software” originated in the world of Linux before it made it to iOS and Android! ![]() Similar to AppStore and PlayStore, Linux apps also come from marketplaces where developers can upload their apps and which are then verified to be free from malware and made ready to be downloaded. Let us understand what it all means shall we! That’s a lot of jargon thrown into a single sentence! “apt update” updates the package sources list to get the latest list of available packages in the repositories ![]() Using apt-get update and apt-get upgrade is essential for keeping your Linux system up-to-date with the latest package releases.This article is all about demystifying the “ sudo apt update” command by learning what it does and how it does it!įor those of you in a hurry, here is the “Short Version” of the answer! sudo apt update: In a Nutshell!Ī simple one-line answer to the question: what does “sudo apt update” do? In a nutshell, "apt-get update" updates the package index files, whereas "apt-get upgrade" upgrades the actual packages installed on your system. The "apt-get upgrade" program downloads and installs the most recent packages, replacing any earlier versions that were already on your system. To identify which packages require an upgrade, "apt-get update" is used to gather the necessary information. OTOH, apt-get upgrade is used to update installed packages to the most recent version. It is advised to run apt-get update frequently in order to ensure that the system is aware of the latest available package updates. It downloads the most recent package information from the sources listed in the "/etc/apt/sources.list" file that contains your sources list. The command apt-get update is used to update the package index files on the system, which contain information about available packages and their versions. Sudo apt-get upgrade Apt-get upgrade vs Apt-get updateīoth apt-get update and apt-get upgrade are used to install packages in Linux, but they are used for different purposes. To update the packages using apt-get upgrade use the following command: This command only upgrades existing packages and does not install any new packagesīefore using "apt-get upgrade", it's recommended to run "apt-get update" to ensure that your system has the latest information about available package updates. The "apt-get upgrade" command is used to upgrade already installed packages to the latest version, based on the information obtained through a previous "apt-get update" or "apt update" command. To update the packages using apt-get update use the following command:Īll the package information is stored in /etc/apt/sources.list path. This command downloads the updated package information as specified in the sources file when executed. The system tracks changes to each package when a new version is released using either the "apt-get update" or "apt update" command. In Linux, every installed package has its details stored on the system. In this article, we'll explore what these commands do, how they work, and why they're important. Two commonly used commands in APT package management are apt-get update and apt-get upgrade. APT makes it easy to keep your system up-to-date with the latest package releases. ![]() APT (Advanced Packaging Tool) is a package manager used for installing, updating, and managing software packages on Linux systems, particularly Debian and Ubuntu.
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