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#!/bin/sh
#set varible a
a="hello world"
#print a
echo "A is:"
echo $a
输出:
A is:
hello world
2
#!/bin/sh
#set varible num
num=2
echo "this is the ${num}nd"
输出:
this is the 2nd
3
#!/bin/sh
echo "number of vars:"$#
echo "values of vars:"$*
echo "value of var1:"$1
echo "value of var2:"$2
echo "value of var3:"$3
echo "value of var4:"$4
运行
./s3 1 2 3 4
输出
number of vars:4
values of vars:1 2 3 4
value of var1:1
value of var2:2
value of var3:3
value of var4:4
4
#!/bin/bash
hello="var1"
echo $hello
function func1 {
local hello="var2"
echo $hello
}
func1
echo $hello
运行输出
var1
var2
var1
5
#!/bin/sh
folder=/home
[ -r "$folder" ] && echo "Can read $folder"
[ -f "$folder" ] || echo "this is not file"
运行输出
Can read /home
this is not file
6
#!/bin/bash
for day in Sun Mon Tue Wed Thu Fri Sat
do
echo $day
done
运行输出
Sun
Mon
Tue
Wed
Thu
Fri
Sat
7
#!/bin/bash
echo "Hit a key, then hit return."
read Keypress
case "$Keypress" in
[A-Z] ) echo "Uppercase letter";;
[a-z] ) echo "Lowercase letter";;
[0-9] ) echo "Digit";;
* ) echo "Punctuation, whitespace, or other";;
esac
运行输出
8
#!/bin/bash
for day in "Sun Mon Tue Wed Thu Fri Sat"
do
echo $day
done
运行输出
Sun Mon Tue Wed Thu Fri Sat