I'm wondering if it's possible to use linux on a mobile phone as a main operating system, not emulated or in a virtual box. If this is possible, it could expand a lot pen-testing capabilities of a phone.

Please help…

I didn't find the right solution from the Internet.
References
https://www.linuxquestions.org/questions/linux-mobile-81/can-linux-work-on-mobile-phones-4175594767/
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