Rooting 1

Hello, I tried different variation to change the directory but seems all my efforts are just useless i know basic command of changing directory is CD when ever i am trying to use that CD command i am getting disconnected. So i need some help i read lots of articles about Unix commands but not working for me. Can i pm some one or, please some one push me to the right track or, at least give some URL or, hints to solve this challenge. Thank you.

I just solved the problem it was a really easy mission but fault is mine i made things hard for me i used simple commands and now i finished this challenge.if any need help please PM me