可能重复:
如何删除.txt文件中的空行
使用sed,如何删除所有空白行?
输入文件:
Steve Blenheim:238-923-7366:95 Latham Lane,Easton,PA 83755:11/12/56:20300
Betty Boop:245-836-8357:635 Cutesy Lane,Hollywood,CA 91464:6/23/23:14500
Igor Chevsky:385-375-8395:3567 Populus Place,Caldwell,NJ 23875:6/18/68:23400
Norma Corder:397-857-2735:74 Pine Street,Dearborn,MI 23874:3/28/45:245500
Jennifer Cowan:548-834-2348:583 Laurel Ave.,Kingsville,TX 83745:10/1/35:58900