Originally Posted by repo
Try to use the sudo command
When prompted for a password, give the users password
This will work if you have sudo priveledges, and have sudo installed. If you don't, then change to the root user and move the file.
then enter the root user password, sometimes the system administrator password. Be sure to log out of root afterwards.
As repo suggested, sudo is a very useful utility, if you don't yet have it installed. I would suggest getting it and configuring it to allow your standard user access to root commands when you type in your password.
Basic howto on configuring sudo