ATtiny85 DigiSpark not detected (Linux)

[hary]

Hi

I have an ATtiny85 DigiSpark I'm trying to program but it seems it's not seen by Arduino software.
I have Arduino 1.8.19 on Linux.
I followed that instructions
Everything seems to go well, but despite I plug the ATtiny in , the Digispark uploader always timeout without finding the Digispark.

I never used it before, I guess it should have the boot-loader inside, right ? It seems it was delivered already with a blink sketch as 1 LED is fix ON and the other in blinking.

Should I try to re-burn the bootloader ?

All the information I find about ATtiny85 are quite confusing and spread everywhere in the web with a lot of changes over the time.
Anyone would have a proper link with information up to date explaining both way to upload sketches with or without bootloader ?

[xfpd]

Verifying: You added Additional Boards Manager URL?

[hary]

I can choose from different ATtiny board in the Arduino menu (85, 45, 25), so yes, I guess I properly add the boards in the board manager.

But from this link, it seems there are different way to do it !
At least 3 :
http://drazzy.com/package_drazzy.com_index.json

http://www.leonardomiliani.com/repository/package_leonardomiliani.com_index.json

https://raw.githubusercontent.com/damellis/attiny/ide-1.6.x-boards-manager/package_damellis_attiny_index.json

https://mesom.de/atflash/package_atflash_index.json

http://digistump.com/package_digistump_index.json

https://raw.githubusercontent.com/FemtoCow/ATTinyCore/master/Downloads/package_femtocow_attiny_index.json

https://raw.githubusercontent.com/RobotCing/Cing/master/Software/Packages/package_RobotCing_index.json

Plus you have different way to use it :

• with or without boot-loader
• When you have boot-loader you can use UART or a USB converter

All that add to the confusion

[killzone_kid]

You should use digistump only