sed作业2

先将以下文本存入一个文件中，命名为sedtest

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 23874:3/28/45:245700
Jennifer Cowan:548-834-2348:583 Laurel Ave., Kingsville, TX 83745:10/1/35:58900
Jon DeLoach:408-253-3122:123 Park St., San Jose, CA 04086:7/25/53:85100
Karen Evich:284-758-2857:23 Edgecliff Place, Lincoln , NB 92743:7/25/53:85100
Karen Evich:284-758-2867:23 Edgecliff Place, Lincoln, NB 92743:11/3/35:58200
Karen Evich:284-758-2867:23 Edgecliff Place, Lincoln, NB 92743:11/3/35:58200
Fred Fardbarkle:674-843-1385:20 Parak Lane, Duluth, MN 23850:4/12/23:780900
Fred Fardbarkle:674-843-1385:20 Parak Lane, Duluth, MN 23850:4/12/23:780900
Lori Gortz:327-832-5728:3465 Mirlo Street, Peabody, MA 34756:10/2/65:35200
Paco Gutierrez:835-365-1284:454 Easy Street, Decatur, IL 75732:2/28/53:123500
Ephram Hardy:293-259-5395:235 CarltonLane, Joliet, IL 73858:8/12/20:56700
James Ikeda:834-938-8376:23445 Aster Ave., Allentown, NJ 83745:12/1/38:45000
Barbara Kertz:385-573-8326:832 Ponce Drive, Gzary, IN 83756:12/1/46:268500
Lesley Kirstin:408-456-1234:4 Harvard Square, Boston, MA 02133:4/22/62:52600
William Kopf:846-836-2837:6937 Ware Road, Milton, PA 93756:9/21/46:43500
Sir Lancelot:837-835-8257:474 Camelot Boulevard, Bath, WY 28356:5/13/69:24500
Jesse Neal:408-233-8971:45 Rose Terrace, San Francisco, CA 92303:2/3/36:25000
Zippy Pinhead:834-823-8319:2356 Bizarro Ave., Farmount, IL 84357:1/1/67:89500
Arthur Putie:923-835-8745:23 Wimp Lane, Kensington, DL 38758:8/31/69:126000
Popeye Sailor:156-454-3322:945 Bluto Street, Anywhere, USA 29358:3/19/35:22350
Jose Santiago:385-898-8357:38 Fife Way, Abilene, TX 39673:1/5/58:95600
Tommy Savage:408-724-0140:1222 Oxbow Court, Sunnyvale, CA 94087:5/19/66:34200
Yukio Takeshida:387-827-1095:13 Uno Lane, Ashville, NC 23556:7/1/29:57000
Vinh Tranh:438-910-7449:8235 Maple Street, Wilmington, VM 29085:9/23/63:68900

1. 把Jon的名字改为Jonathan。
[root@Centos7 test]# sed -n '/Jon/{p;s/Jon/Jonathan/;p}' sedtest
Jon DeLoach:408-253-3122:123 Park St., San Jose, CA 04086:7/25/53:85100
Jonathan DeLoach:408-253-3122:123 Park St., San Jose, CA 04086:7/25/53:85100

sed默认是打印模式空间的全部内容，而在做筛选时会每条都读入模式空间，-n表示不打印模式空间
/Jon/表示先筛选出包含Jon的行，因为用正则表达式，所以要用/ /将起括起
{ }内表示要对筛选出的行做的操作，每个操作命令间用;分号隔开
第一个p为打印出原筛选出的行
第二段s命令将Jon进行替换
第三段的p打印出已替换完成的行

[b]2. 删除头3行。[/b]

[root@Centos7 test]# sed '1,3d' sedtest

3. 打印第5~10行。
[root@Centos7 test]# sed -n '5,10p' sedtest

4、删除含有Lane的所有行[root@Centos7 test]# sed '/Lane/d' sedtest5. 打印所有生日在十一月或十二月的行。[root@Centos7 test]# sed -n '/:1[12]\//p' sedtest6. 在以Kare开头的行末尾加上3颗星。[root@Centos7 test]# sed -n '/^Kare.*$/{p; s/^Kare.*$/&***/g; p}' sedtest 先找以Kare开头的行打印，&表示前面匹配到的所有内容，最后将匹配到并修改后的内容再打印出来7. 将所有包含Jose的行都替换为JOSE HAS RETIRED。[root@Centos7 test]# sed -n '/Jose/c JOSE HAS RETIRED' sedtestc命令，将匹配到的行全部替换为指定字符串
8. 把Popeye的生日改为11/14/46，假定您不知道Popeye的生日，设法用正则式查找出来。 [root@Centos7 test]# sed -nr '/Popeye/{p;s#:([1-9]|1[12])/([1-9]|1[0-9]|2[0-9]|3[01])/[0-9][0-9]#:11/14/46#g; p}' sedtest因为要用扩展正则表达式，所以加-r参数 先匹配Popeye的行，然后查找其生日的字段，此处正则表达式用了或，正则表达式里有一个用ifconfig命令筛选出ip地址的练习
9. 删除所有空行。[root@Centos7 test]# sed '/^$/d' sedtest
10、把名和姓倒换位置后打印全部内容[root@Centos7 test]# sed -r 's/^(\w*)[[:space:]]*(\w*)/\2 \1/g' sedtest