![]() ![]() By default, the apt upgrade command removes old versions of installed or upgradeable packages on the. You can resume from where is stopped if for some reason aborted or unplugged. For example, you would enter sudo apt-get update. Other lists of packages are located in the /etc/apt/. The package index file is a file or database that contains a list of software packages defined in repositories located in the /etc/apt/sources.list file. It does not upgrade any packages, as some Linux users are misled to believe. ![]() The apt update command updates the package index of a Linux system or package lists. To update the packages using apt-get upgrade use the following command: sudo apt-get upgrade Apt-get upgrade vs Apt-get update Both apt-get update and apt-get upgrade are used to install packages in Linux, but they are used for different purposes. This is a command that is mostly invoked after a fresh system install or before installing a new software package. Whereas the apt update process actually upgrades and installs new and existing packages. The main difference is that apt update gets the package list from your software repositories including the third-party repositories which you manually configured. Difference between apt update and upgrade In this guide, we seek to distinguish the differences between sudo apt update and sudo apt upgrade. For some, these play the same role, which is not the case. In case that you add a PPA to the software repositories, updating them is mandantory.The apt update and upgrade are two of the most commonly used yet misunderstood commands for many Linux users. It is recommended to update them every time before installing new packages. Generally it is enough to update the repository once a day.īut as the updates are pushed irregularly to the Ubuntu repositories, ![]() It is impossible to predict how often it changes, in general, without reference to a specific issue or bug report, or without following the development of that Ubuntu release. Apart from the apparent differences between commands, apt also introduced changes to the output design. Also, it was simpler to use as you didn’t have to switch between apt-get and apt-cache. The package list changes whenever a package is upgraded on the mirror. Note: The apt command is more user-friendly compared to the existing APT tools. A special case of this is when the package lists are up to date, which is after a reasonably short time since the last apt-get update this means that all packages on the mirror are the same version as they were. However, it is not necessary, if you know that no new version of that package and of its dependencies have been made available on the mirrors since the last apt-get update. There is no reason not to run apt-get update before installing a package. ![]() It is essential before upgrading the installed packages, because the system cannot know whether the repo has a new version of a package, unless it has an up-to-date copy of the package list. Can you use sudo apt-get dist-upgrade as your regular upgrade tool Certainly. Of course, apt-get update is necessary after you have changed the repositories, because the system needs to download the list for the new repositories. Apt-get upgrade does not remove packages, it only upgrades. If you don't do it before an installation, apt-getmight complain that it cannot find the package in the repository, because it computed the URL based on an old version of the list (which listed an older version of the package). When you install a package, apt-get reads the list and determines the URL of the package to download (which typically contains package version information).Īpt-get update updates the package lists. Your copy of Ubuntu has a private copy of the list of packages that are in Ubuntu's repositories. ![]()
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