现象是这样的： 配置好一个ROS，然后用在作业环境， 过一段时间（若干小时） ，我使用新的用户名访问ROS会提示密码错误， 这时候用原始的admin用户能进入， 也就是用户权限这块的设置恢复到初始状态了，这让我纳闷，为什么会这样？
sorry, english only
“Phenomenon is this: configure a ROS, and then used in the operating environment, over a period of time (several hours), I use the new user name to access the ROS will prompt for password error, this time with the original admin user can enter, that is, the user access this setting back to initial state, and it makes me wonder, why is it so?”
if you can’t speak english, you might be able to make some sense out of it with google translator