mongo 3.0 备份和还原数据库 ,及too many positional arguments错误

./mongodump -h localhost -d liongo -o ./

错误方式：

会报错：

2017-01-27T15:31:54.217+0800 error parsing command line options: --dbpath and related flags are not supported in 3.0 tools. See http://dochub.mongodb.org/core/tools-dbpath-deprecated for more information 2017-01-27T15:31:54.217+0800 try 'mongorestore --help' for more information

使用mongorestore –help,正确还原方式为（去掉–directoryperdb）：

 too many positional arguments错误

           这个文件名中间有个空格    就导致了接下来too many positional arguments错误的产生