I have a NAS and I would like to run a python3 program using putty (SSH) but my code is in python3 while the pre-installed version of python there is python 2.7. How can I install python3 using SSH?
As QNAP seems to run their own Linux for their NAS you need to install Python 3 via their App center.
It should be available according to their Release Notes: 1
There also seems to be a subreddit here: 2
And a blog about Python on their OS here: 3