端子出力の再解析

apt-get updateたとえば、端末でいくつかのコマンドを実行して出力を保存するプログラムがあります。

不要な情報がすべて削除されるように出力を再解釈するにはどうすればよいですか？

たとえば、元の出力は次のようになります（これは出力のほんの一部です）。

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これはbashで通常のコマンドを実行するかのように解釈する必要があります。つまり、最終出力は次のようになります。

Reading package lists... Done