Question: when I open up the terminal and write the command 

```
cd Desktop  

```

also I have tried 

```
cd /Desktop

```

a message appears that no file or directory was found what I suppose to do? I have logged in as a root but still have the same problem any help?

Answer: 
`cd Desktop/` Goes to the Desktop directory if you are in your home directory.

`cd -` Goes back to previous directory.

`cd /` Take you to the root directory.

`cd ~/Desktop` Will take you to your Desktop Directory no matter where you are.
Run this command in terminal,it will help you.

```
cd ~/Desktop
gcc yourfilename.c

```