I would suggest the following sources
1) job postings - those offer include the phrases that the employers themselves want to hear
2) keyword lists - they're made for looking for keywords!
3) professional site's skills sections. You could use LinkedIn or any other professional site.
4)Sometimes you can find software that can suggest keywords for you
The kernel has access to all data and hardware.
False. They're usually from a user's home directory in the public_html directory.