// 取出 test.csv 中符合 Email 格式的資料的的grep -E -o“B [A-ZA-Z0-9 ._%+ - ] + @ [A-ZA-Z0-9 .-] + [A-ZA-Z] {2,6} B” test.csv// 獨特的的grep -E -o“B [A-ZA-Z0-9 ._%+ - ] + @ [A-ZA-Z0-9 .-] + [A-ZA-Z] {2,6} B” test.csv | 排序| uniq的的