linux shell脚本 getopt使用

以下是关于Linux shell脚本中getopt的使用示例：

#!/bin/bash
echo "opt:" ${opt}
for opt; do
    case $opt in
    a) echo "a " ;;
    b) echo "b " ;;
    *) echo "other " ;;
    esac
done

#!/bin/bash
while getopts "a:" opt; do
    case $opt in
    a) echo "this is -a the arg is ! $OPTARG" ;;
    \?) echo "Invalid option: -$OPTARG" ;;
    esac
done