In 7 64 - bit Linux centos, this is the default mode, the terminal practice, accidentally uninstalled CD, namely this command: unmount to/dev/sr0, lead to my Home, also is what/root this Home directory is missing, how to do? Before there is a video, pictures, etc., these documents are missing, and to create the folder in the root directory is to create a table, before is created under/root, for the novice, a great god help me with my last photo is the information he gave me