I have 2 machines. One is running PG server on *nix. Second is my app on Windows.
An application starts for the first time.
What is “clientencoding in this case?
This day in age, probably UTF-8; which is what most servers are initialized using. If you aren't having issues with encoding I suggest you just take for granted that the defaults work in 99% of the cases. If you are having issues, share the details.