yum (Yellowdog Updater, Modified)
YUM, or Yellowdog Updater, Modified, is a free,
open-source tool that manages software packages for Linux systems:
What it does
YUM can install, update, remove, and query RPM software
packages from official and third-party repositories. It can also automatically
resolve dependencies during installation.
How it works
YUM is a front-end for the RPM package manager. It stores packages in software repositories or repos. Repos can be local or
remote, and users can access them over a network connection.
How to use it
YUM has a command-line interface, but other tools provide
graphical user interfaces. For example, to update all packages in the system,
you can run the command yum update. To update only security-related packages,
you can run the command yum update --security.
History
YUM was originally a rewrite of Yellowdog UPdater (YUP),
a software updater for Yellow Dog Linux. A newer version of YUM called
Dandified YUM (DNF) has replaced YUM as the default package manager in Fedora
and Red Hat Enterprise Linux.