文章作者：Tyan
博客：noahsnail.com | CSDN | 简书
shell3
1. $
在Linux Shell脚本中，$#用来表示传入的参数数量。例如：
- shell脚本test0
#!/bin/bash
# test $#
echo "The number of parametes is $#."
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- 执行结果
$ ./test0
The number of parametes is 0.
$ ./test0 1 2 3
The number of parametes is 3.
$ ./test0 a bc
The number of parametes is 2.
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2. $@
在Linux Shell脚本中，$#用来表示传入的参数列表。例如：
- shell脚本test1
#!/bin/bash
# test $@
echo "The parametes are $@."
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- 执行结果
$ ./test1
The parametes are .
$ ./test1 1 2 3
The parametes are 1 2 3.
$ ./test1 a bc
The parametes are a bc.
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- 遍历
$@
for var in $@
do
echo "$var"
done
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3. 0,0,1
在Linux Shell脚本中，$0用来表示要执行的shell脚本名称。$1，$2用来表示传入到脚本中对应位置的参数，例如：
- shell脚本test2
#!/bin/bash
# test $0，$1
echo "The shell is $0."
echo "The first parameter is $1."
echo "The first parameter is $2."
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- 运行结果
$ ./test2
The shell is ./test2.
The first parameter is .
The first parameter is .
$ ./test2 1 2
The shell is ./test2.
The first parameter is 1.
The first parameter is 2.
$ ./test2 a 2
The shell is ./test2.
The first parameter is a.
The first parameter is 2.
$ ./test2 a b
The shell is ./test2.
The first parameter is a.
The first parameter is b.
$ ./test2 a b c
The shell is ./test2.
The first parameter is a.
The first parameter is b.
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