Programming Arduino Due with Raspberry Pi

Hallo!

Ihave done a lot of programmin and are also used to th new 1,8,10 IDE...

Today I installted the same IDE on my Raspberry Pi, but I cant find the Board Manager, it is missing!
Also Missing ist Arduino Due Board, so i cant select it....

Does anybody have some suggestion on how to use the due with my Raspberry?

With best regards
Werner

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Screenshot from 2019-10-06 14-00-08.png

Screenshot from 2019-10-06 14-00-08.png

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