apt-get update and apt-get upgrade are two different commands. We’ve talked about the first one above, but what does the later do? sudo apt-get upgrade. Well, apt-get upgrade simply upgrades/installs the new version of the package available over the old one. An update must be performed first so that apt-get knows that new versions of packages are available. dist-upgrade In addition to performing the function of upgrade , this option also intelligently handles changing dependencies with new versions of packages; apt-get has a "smart" conflict resolution system, and it will attempt to upgrade the Oct 24, 2018 · What does sudo apt-get update command do? The sudo apt-get update command is used to download package information from all configured sources. The sources often defined in /etc/apt/sources.list file and other files located in /etc/apt/sources.list.d/ directory. So when you run update command, it downloads the package information from the Internet. update. resynchronizes the local index of packages files, updating information about new and updated packages that are available. The indexes are fetched from the location(s) specified in /etc/apt/sources.list.

Jul 21, 2020 · Run the equivalent of apt-get update when a change occurs. Cache updates are run after making changes. Cache updates are run after making changes. validate_certs Because the apt-get update is not run, your build can potentially get an outdated version of the curl and nginx packages. Using RUN apt-get update && apt-get install -y ensures your Dockerfile installs the latest package versions with no further coding or manual intervention. This technique is known as “cache busting”.

Mar 09, 2017 · Perform the system update and then apply system modifications by restarting the system: sudo yum update -y && sudo shutdown -r now On Ubuntu 16.04 or Debian 8: Update the list of packages which can be updated: sudo apt-get update -y Then install updates and then apply them by restarting the system: sudo apt-get upgrade -y && sudo shutdown -r now

Jul 29, 2019 · When you do an apt-get upgrade after apt-get update, it upgrades the installed packages to the newer version. This is the reason why the fastest and the most convenient way to update Ubuntu is to use this command: sudo apt-get update && sudo apt-get upgrade -y Using apt-cache commands to search for packages Jun 30, 2016 · apt-get check This command is a diagnostic tool. It does an update of the package lists and checks for broken dependencies. apt-get -f install. This command does the same thing as Edit->Fix Broken Packages in Synaptic. Do this if you get complaints about packages with "unmet dependencies". apt-get autoclean