The `yum` package manager, common in RPM-based Linux distributions, provides a mechanism to retrieve software packages from configured repositories. A specific command option allows for the retrieval of a package, along with all other packages required for its correct operation, without actually installing it on the system. This functionality is useful when building a local repository, examining package dependencies, or preparing for installation on a system without direct internet access. For example, a system administrator can use this option to download all necessary files for a complex application to a portable medium, such as a USB drive, and then transfer them to a disconnected server for installation.
This capability avoids issues stemming from incomplete software installations due to missing prerequisites. By ensuring all dependent packages are downloaded together, potential conflicts or errors during the installation process are minimized. Historically, managing dependencies has been a significant challenge in software deployment. This feature provides a controlled and predictable method to address this challenge, especially in environments where system stability and uptime are critical. It is also useful in managing software versions and ensuring consistency across multiple machines.
