Qt 5.8 installation on ubuntu 16.04

[Hlel]

I downloaded Qt 5.8 on my ubuntu 16.14, i got the installer but when i double clic on it to install Qt 5.8 i got this error "could not display qt-opensource-linux-x64-5.8.0.run".
Any help please !!

[hskoglund]

Hi, you need to right click on the file, select Properties, Permissions tab and click the Execute (Allow executing file as program) checkbox.

[Konstantin Tokarev]

Why do you want to install 5.9? You should better use 5.9 or 5.11

[Hlel]

@hskoglund thank youuuu very very much Sir, this works well !!! thank you for your help

[Hlel]

@Konstantin-Tokarev i need 5.8 version, t installed 5.9 there is no problem with that version, but i need 5.8