Which package manager is primarily used in Red Hat-based distributions like CentOS, RHEL, and Fedora? 哪一個套件管理器主要用於以 Red Hat 為基礎的發行版（如 CentOS、RHEL 和 Fedora）？
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Learning notes
dnf (and previously yum) is the default package manager for Red Hat ecosystems apt is used for Debian/Ubuntu. dnf（以及早期的 yum）是 Red Hat 生態系的預設套件管理器 apt 則用於 Debian/Ubuntu 系統