Shell脚本传参数方法总结

[root@svn shell_example]# cat params.sh
#!/bin/bash
#传参测试脚本
echo "My name is `basename $0` -I was called as $0"
echo "My first parameter is : $1"
echo "My second parameter is : $2"

[root@svn shell_example]# sh params.sh
My name is params.sh -I was called as params.sh
My first parameter is :
My second parameter is :

[root@svn shell_example]# sh params.sh one two
My name is params.sh -I was called as params.sh
My first parameter is : one
My second parameter is : two

[root@svn shell_example]# sh params_v2.sh
My name is params_v2.sh -I was called as params_v2.sh
I was called with 0 parameters.
Usage: params_v2.sh first second
You provided 0 parameters,but 2 are required.

[root@svn shell_example]# cat params_v2.sh
#!/bin/bash
# 这是个测试脚本传参的测试例子

echo "My name is `basename $0` -I was called as $0"
echo "I was called with $# parameters."

if [ "$#" -eq "2" ];then
    echo "My first parameter is $1"
    echo "My second parameter is $2"
else
    echo "Usage: `basename $0` first second"
    echo "You provided $# parameters,but 2 are required."
fi

[root@svn shell_example]# sh params_v2.sh
My name is params_v2.sh -I was called as params_v2.sh
I was called with 0 parameters.
Usage: params_v2.sh first second
You provided 0 parameters,but 2 are required.

[root@svn shell_example]# sh params_v2.sh one two three
My name is params_v2.sh -I was called as params_v2.sh
I was called with 3 parameters.
Usage: params_v2.sh first second
You provided 3 parameters,but 2 are required.

[root@svn shell_example]# sh params_v2.sh one two
My name is params_v2.sh -I was called as params_v2.sh
I was called with 2 parameters.
My first parameter is one
My second parameter is two

[root@svn shell_example]# cat manyparams.sh
#!/bin/bash
#这是个测试脚本传N个参数的例子

echo "我的名字是 `basename $0` - 我是调用自 $0"
echo "我有 $# 参数"

count=1
while [ "$#" -ge "1" ];do
    echo "参数序号为 $count 是 $1"
    let count=count+1
    shift
done

[root@svn shell_example]# sh manyparams.sh one two three four five