aptとapt-getの違い

aptは手動実行時、apt-getはシェルスクリプト等の中って聞いたことあるけど、具体的にどう違うんだ

APT is a vast project, whose original plans included a graphical interface. It is based on a library which contains the core application, and apt-get is the first front end — command-line based — which was developed within the project. apt is a second command-line based front end provided by APT which overcomes some design mistakes of apt-get.

APTというクソデカプロジェクトがあって、当初はGUIが含まれるプランがあった

apt-getはCUIをフロントエンドとした実装で、aptはapt-getの改造版

Both tools are built on top of the same library and are thus very close, but the default behavior of apt has been improved for interactive use and to actually do what most users expect. The APT developers reserve the right to change the public interface of this tool to further improve it. On the opposite, the public interface of apt-get is well defined and will not change in any backwards incompatible way. It is thus the tool that you want to use when you need to script package installation requests.

両方にてるけど、aptはデフォルトの挙動がインタラクティブ

対して、apt-getのインターフェースは明確な定義があって（？）後方互換性のない変更が行われない

インタラクティブに使いたい手動実行時はaptで、互換性を保ちたい（1回書いて長く使いたい）シェルスクリプト等の中ではapt-getのほうが適している、ということのようです