-A: Get lines after match
-B: Get lines before match
-C: Get lines both before and after match
-i: Case-insensitive match
-v: Only lines that don't match
-w: Whole-word matches only
-h: Prefix filename to match output
-o: Only output matching portion
-l (lowercase L): Only output file names
-r: Recurse through directories
-I (uppercase i): Search only textfiles
-e: Activate extended regex flags