Code to change from read-only file system to read/write file system?

[GreyGeek]

stevenvollom at sbcglobal.net wrote:
> I am stuck in a command line that is read only.  I want to copy the 
> xorg.conf file and rename it for  back-up and am unable to do so.
>
> Steven
>
>   
That is because you are issuing your commands as a user who does not
have permission to modify a file in /etc

Use the sudo command to preface your mv command, or open a root
console:  "sudo su -"