![]() ![]() 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. In case that you add a PPA to the software repositories, updating them is mandantory.APT (Advanced Packaging Tool) is a package manager used for installing, updating, and managing software packages on Linux systems, particularly Debian and Ubuntu. ![]() 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. The package list changes whenever a package is upgraded on the mirror. 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. 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. 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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