#!/bin/bash

preName=""

ls ID* | sort | while read fileName
do
        preID=${preName/%.*/};
        curID=${fileName/%.*/};

        if [ "$preName" != "" -a "$preID" = "$curID" ];then
                rm $preName;
                echo "rm ${preName}.........";
        fi

        preName=$fileName
done

------解决方案--------------------
探讨

记录一个preName就可以了，如果file==preName，那么删除preName。