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When managing packages on any Linux distribution, repositories are a crucial component. They are online sources from which packages are installed or updated. Occasionally, you may find the need to disable specific repositories temporarily. This might be necessary to troubleshoot conflicts, test software versions, or optimise system performance. Here, we'll explore how to temporarily disable repositories on various package managers, including apt (used by Ubuntu and other Debian-based distributions), dnf (used by Fedora and RHEL-based distributions), and zypper (used by openSUSE and SUSE Linux Enterprise). 1. Using apt on Debian-based Distros In Debian-based systems like Ubuntu, repositories are managed in the /etc/apt/sources.