The offline installer supports a scripted mode:
# Linux / macOS
./qt-opensource-linux-x64-6.5.3.run --script qt-install-script.qs --platform minimal --verbose
Cause: You installed the Qt6 Offline Installer on a minimal Ubuntu/Docker container, but the system lacks zlib1g-dev.
Fix: Qt6 Offline Installer
sudo apt-get install build-essential libgl1-mesa-dev libxcb-util-dev libz-dev
chmod +x qt6-offline-linux-x64-6.6.0.run
sudo ./qt6-offline-linux-x64-6.6.0.run --install
Use the --script option for silent installation (critical for automation): The offline installer supports a scripted mode: #
./qt6-offline-installer.run --script qt-install-script.qs --silent
Where qt-install-script.qs contains your component choices. chmod +x qt6-offline-linux-x64-6