Добавление диспетчера загрузки Windows в GRUB2

$ cat test.txt
AAA, BBB, CCC, DDD, EEE, FFF, GGG, HHH
AAA, BBB, CCC, DDD, EEE, FFF, GGG, HHH
AAA, BBB, CCC, DDD, EEE, FFF, GGG, HHH

$ awk -F, '{$2=$2","$2}1' OFS=, test.txt
AAA, BBB, BBB, CCC, DDD, EEE, FFF, GGG, HHH
AAA, BBB, BBB, CCC, DDD, EEE, FFF, GGG, HHH
AAA, BBB, BBB, CCC, DDD, EEE, FFF, GGG, HHH