What is in grep command?

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Tags

1. #locate
2. #print
3. #command
4. #input
5. #occur
6. #lines
7. #expressions
8. #searching
9. #output
10. #standard
11. #files
12. #common
13. #where
14. #matches
15. #utility
16. #certain
17. #specific
18. #returning
19. #program