How to find kettle.properties file in UNIX machine?

I have kettle.propeties file in my windows local machine, Now i want to copy this into UNIX machine. i am not sure where to copy this in UNIX.
Please give me detailed notes how to find kettle.properties in UNIX and how restart SPOON in UNIX and where to copy the kettle.properties file.

Your help is must appreciated.

Many Thanks in Advance.

Regards
Amar