Linux Tutorials - Herong's Tutorial Examples - v5.37, by Dr. Herong Yang
What Is DNF
Provides a quick introduction on DNF (also called Dandified YUM), which is the next generation of YUM (Yellowdog Update Modified) software package manager for RPM (RedHat Package Manager) based Linux distributions.
What Is DNF? - DNF, also called Dandified YUM, is the next generation of YUM (Yellowdog Update Modified) software package manager for RPM (RedHat Package Manager) based Linux distributions.
Here is the description of DNF from its manual page: "DNF is the next upcoming major version of YUM, a package manager for RPM-based Linux distributions. It roughly maintains CLI compatibility with YUM and defines a strict API for extensions and plugins."
You can get a list of DNF commands by running "dnf help" on CentOS 8:
herong$ dnf help usage: dnf [options] COMMAND List of Main Commands: alias List or create command aliases autoremove remove all unneeded packages that were originally installed as dependencies check check for problems in the packagedb check-update check for available package upgrades clean remove cached data deplist List package's dependencies and what packages provide them distro-sync synchronize installed packages to the latest available versions downgrade Downgrade a package group display, or use, the groups information help display a helpful usage message history display, or use, the transaction history info display details about a package or group of packages install install a package or packages on your system list list a package or groups of packages makecache generate the metadata cache mark mark or unmark installed packages as installed by user. module Interact with Modules. provides find what package provides the given value reinstall reinstall a package remove remove a package or packages from your system repolist display the configured software repositories repoquery search for packages matching keyword repository-packages run commands on top of all packages in given repository search search package details for the given string shell run an interactive DNF shell swap run an interactive dnf mod for remove and install one spec updateinfo display advisories about packages upgrade upgrade a package or packages on your system upgrade-minimal upgrade, but only 'newest' package match which fixes a problem that affects your system
Some commonly used DNF commands are:
herong$ dnf search java java-11-openjdk.x86_64 : OpenJDK Runtime Environment 11 java-11-openjdk-src.x86_64 : OpenJDK Source Bundle 11 java-11-openjdk-demo.x86_64 : OpenJDK Demos 11 ... herong$ dnf info perl Available Packages Name : perl Epoch : 4 Version : 5.26.3 Release : 416.el8 Architecture : x86_64 Size : 72 k Source : perl-5.26.3-416.el8.src.rpm Repository : AppStream Summary : Practical Extraction and Report Language URL : http://www.perl.org/ License : GPL+ or Artistic Description : Perl is a high-level programming language with roots : in C, sed, awk and shell scripting. ... herong$ sudo dnf install perl ... Installed: perl-4:5.26.3-416.el8.x86_64 perl-Encode-Locale-1.05-9.el8.noarch perl-TermReadKey-2.37-7.el8.x86_64 ... Complete!
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