This is not a support forum man, this is a forum where all ppl that use directadmin try to help each other.
Directadmin support can be contacted via email but, copy or move a file is not related in any way to directadmin, is just linux statement that you should know.
Have directadmin doesnt mean that they must tell you how to use linux in basic command but help you when you got problem related to directadmin.
For example, directadmin install apache, but if apache have a bug, directadmin's support is not forced to solve it for you, cause is apache related... on this forum ofc you will find someone that help you, and my was just a suggestion, cause, is better for you aswell know the basic of the operating system you use.
If you buy a computer from toshiba, toshiba will give support for hardware problem, if you install for example office or any other program not created from toshiba, they will not help you on solve problem related on those programs..
I repeat, as you sayd, ive always helped you, doing the job for you aswell for free and you know that, but, know the basic of the operating system is very improtant specially for yourself! Im not saying that ill not help you anymore or stupid things like those, but, copy and move command are very basic command and not related to directadmin...
Best regards and if im been rude, sorry, isnt my intention, is just my suggestion for make you grown on server administration.