You're looking to download the Qt 5.15.2 offline installer. Here's some informative content to help you:
Select Qt 5.15.2 and choose the Offline Installer for your operating system (Windows, macOS, or Linux). For Open-Source Users download qt 5.15.2 offline installer
Qt is a powerful cross-platform application development framework used for developing applications with a graphical user interface (GUI) and a lot more. If you're looking to develop applications using Qt, you'll need to download and install the Qt framework on your system. In this article, we'll walk you through the process of downloading the Qt 5.15.2 offline installer. You're looking to download the Qt 5
wget https://download.qt.io/archive/qt/5.15/5.15.2/md5sums.txt md5sum qt-opensource-linux-x64-5.15.2.run download qt 5.15.2 offline installer