一、撰写一个script,让使用者输入:1.first name 2.last name,最后在屏幕上显示:Your full name is:的内容
1
2
3
4
|
#!/bin/bash read -p "Please input your firstname:" firstname read -p "Please input your lastname:" lastname echo -e "Your full name is:$firstname $lastname" |
二、用户输入2个变量,然后将2个变量相乘,最后输出相乘结果
1
2
3
4
5
|
#!/bin/bash read -p "input first number:" firstnu read -p "input second number:" secnu total=$(($firstnu*$secnu)) echo -e "the result of $firstnu x $secnu is $total" |
三、使用source执行script,可将变量置于父进程(环境)中
四、用户输入一个filename,并做如下判断:
-
filename的档案是否存在,不存在就终止程序
-
若存在,则判断是文件还是目录,并输入结果
-
判断当前身份用户对该档案/目录所具有的权限,并输出结果
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
#!/bin/bash echo -e "Please input a filename,this program will check the file's type and permission" read -p "Input a filename:" filename #1.判断使用者是否真有输入字符串 test -z $filename&& echo "You must input a filename" && exit 0 #2.判断档案是否存在,不存在则终止程序 test ! -e $filename&& echo "the filename $filename no exist" && exit 0 #3.判断文件类型及属性 test -f $filename&&filetype= "regular file" test -d $filename&&filetype= "directory" test -r $filename&&perm= "readable" test -w $filename&&perm= "$perm writable" test -x $filename&&perm= "$perm executable" #4.开始输出信息 echo "The filename: $filename is a $filetype" echo "The permisson are: $perm" |
五、使用中括号代替test进行判断
1
2
3
4
5
|
#!/bin/bash read -p "Please choose Y/N:" yn [ "$yn" == "y" -o "$yn" == "Y" ]&& echo -e "OK,continue" && exit 0 [ "$yn" == "n" -o "$yn" == "N" ]&& echo -e "Oh,interrupt" && exit 0 echo -e "I don't know what you mean" && exit 0 |
六、使用if..elif..then..fi判断式
1
2
3
4
5
6
7
8
9
10
11
12
13
|
#!/bin/bash read -p "Please choose Y/N:" yn if [ "$yn" == "Y" ]||[ "$yn" == "y" ]; then echo -e "OK,continue" elif [ "$yn" == "N" ]||[ "$yn" == "n" ]; then echo -e "Oh,interrupt" else echo -e "I don't know what you mean" fi
|