\n\
-c, --count prefix lines by the number of occurrences\n\
-d, --repeated only print duplicate lines\n\
- -f, --skip-fields=N avoid comparing the N first fields\n\
- -s, --skip-chars=N avoid comparing the N first characters\n\
+ -f, --skip-fields=N avoid comparing the first N fields\n\
+ -s, --skip-chars=N avoid comparing the first N characters\n\
-u, --unique only print unique lines\n\
-w, --check-chars=N compare no more than N characters in lines\n\
-N same as -f N\n\