update 更新我們的套件清單 /etc/apt/sources.list,這樣在我們更新時才能比對最新的套件清單,決定是否更新 upgrade 根據前述的更新清單 /etc/apt/sources.list,比對是否更新套件。若有相依性問題,則放棄更新。 dist-upgrade 根據前述的更新清單 /etc/apt/sources.list,比對是否更新套件。若有相依性問題,會嘗試做安裝/移除,將相依性問題解決並更新。 PS. 通常視為較危險的更新 參考資料: man page update update is used to resynchronize the package index files from their sources. The indexes of available packages are fetched from the location(s) specified in /etc/apt/sources.list. For example, when using a Debian archive, this command retrieves and scans the Packages.gz files, so that information […]