Cannot see Board manager / Arduino 1.8.5 on Ubuntu 16.04

Dear All

I downloaded the lastest version of arduino 1-8-5 from arduino.cc to run a linux (ubuntu 16.04) and when I launched it, i got the following (see attachment) but when I select board, I cannot find "board Manager".

Does anybody knows why?

Thank you very much for your help

Fabrice

Maybe you installed Arduino IDE 1.8.5 but that's not the version running in your screenshot. The version running in your screenshot is this Arduino 2:1.0.5:dsfg2-4 garbage that you get from the apt-get arduino command. Delete that version and use the modern IDE version downloaded from:

and your problem will be solved.

Yes got it thanks