Install Qt on Ubuntu

Question

I need to build a simple GUI application. Due to this reason, I decided to install Qt on my Ubuntu 16. I have downloaded the open-source Qt edition from their site. 

Got error:

g@ubuntu:~/Downloads$ ./qt-unified-linux-x86-2.0.5-2-online.run 

./qt-unified-linux-x86-2.0.5-2-online.run: error while loading shared libraries: libX11.so.6: cannot open shared object file: No such file or directory

Answer 1

The Ubuntu package name is qt5-default, not qt.

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