How to manage software repositories in Linux

List the configured repositories, and add or toggle them. Run as root to change repository configuration.

Adding a third-party repository lets it install and update software on your system with root privileges. Add only repositories you trust, and prefer signed ones.

# List repositories
dnf repolist                 # RHEL/OL
apt policy                   # Debian/Ubuntu (shows sources)

# Enable / disable a repo (RHEL/OL)
sudo dnf config-manager --set-enabled <repo>
sudo dnf config-manager --set-disabled <repo>

# Add a repo
sudo dnf config-manager --add-repo <url>.repo   # RHEL/OL
sudo add-apt-repository ppa:<owner>/<name>       # Ubuntu

# Repo files live here
ls -l /etc/yum.repos.d/          # RHEL/OL
ls -l /etc/apt/sources.list.d/   # Debian/Ubuntu