Silly Terminal Question: Syntax/command to Lock a file?

[Paul F.]

Figured it out!
(Well, OK.. I found a place at MacOSXHints where someone way smarter than me figured it out....)

"chflags will let you lock and unlock files.

chflags uchg ~/Desktop/test.txt

this would lock a file

chflags nouchg ~/Desktop/test.txt

this would unlock the file

Worked great!