user信息存储在userInfo.txt中,内容为:
fengtian pts/1 2015-01-06 08:47 (192.168.5.179)
root pts/0 2015-01-01 14:06 (192.168.5.40)
zhangqiang pts/2 2015-01-06 08:49 (192.168.5.167)
root pts/4 2015-01-05 18:25 (192.168.5.40)
durui pts/5 2015-01-06 08:51 (192.168.5.170)
languo.li pts/6 2015-01-06 09:11 (192.168.5.60)
yanyu.chen pts/7 2015-01-06 08:54 (192.168.5.71)
languo.li pts/8 2015-01-06 09:12 (192.168.5.60)
yanyu.chen pts/9 2015-01-06 08:54 (192.168.5.71)
wupeng pts/10 2015-01-06 09:19 (192.168.5.187)
chengbin pts/12 2015-01-06 08:56 (192.168.5.63)
durui pts/13 2015-01-06 08:57 (192.168.5.170)
languo.li pts/14 2015-01-06 09:19 (192.168.5.60)
zhangqiang pts/15 2015-01-06 09:48 (192.168.5.167)
languo.li pts/16 2015-01-06 10:11 (192.168.5.60)
lanfeng.li pts/17 2015-01-06 10:14 (192.168.5.174)
代码为:
要求:
(1)切换到目录/vars
(2)向/vars目录下的每个文件或子目录问好
(3)统计/vars目录下共有多少个文件,并显示出来
#!/bin/bash
cd ./vars
let num=0
for I in $(ls ./*)
do
echo "hello $I"
num=$((num+1))
done
echo "the num of files is $num"
userInfo.txt的内容如下:
fengtian pts/1 2015-01-07 08:34 (192.168.5.179)
root pts/0 2015-01-01 14:06 (192.168.5.40)
yanyu.chen pts/2 2015-01-07 08:41 (192.168.5.71)
root pts/4 2015-01-05 18:25 (192.168.5.40)
yanyu.chen pts/5 2015-01-07 08:41 (192.168.5.71)
zhangqiang pts/6 2015-01-07 08:48 (192.168.5.167)
chengbin pts/7 2015-01-07 08:53 (192.168.5.63)
languo.li pts/8 2015-01-07 08:56 (192.168.5.60)
languo.li pts/9 2015-01-07 08:56 (192.168.5.60)
durui pts/10 2015-01-07 09:20 (192.168.5.170)
durui pts/12 2015-01-07 09:21 (192.168.5.170)
zhangqiang pts/13 2015-01-07 09:48 (192.168.5.167)
languo.li pts/15 2015-01-07 10:20 (192.168.5.60)
lanfeng.li pts/17 2015-01-07 10:44 (192.168.5.174)
#!/bin/bash
fir=0
sec=2
temp=0
lines=$(cut -d ' ' -f1 userInfo.txt | wc -l)
while [ $temp -le $lines ]
do
temp=$((fir+sec))
fir=${sec}
sec=${temp}
echo "$temp," $(sed -n "${temp}p" userInfo.txt) >> result.txt
done
要求:
(1)取出2, 4, 6, 10, 16......等行的用户信息
(2)并将结果保存到result.txt中
dataFile.txt中的内容为:
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 92086:7/25/53:85100
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, DeLuth, MN 23850:4/12/23:780900
Fred Fardbarkle:674-843-1385:20 Parak Lane, DeLuth, 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, Gary, 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
dataFile.txt与grep练习中相同
或
将: