@btekum can you provide some more information, about what you were doing when you encountered this error?? it is a bit hard to help you at the moment, with so little information
edit: didn't realise there was a comment section when I wrote this as an answer
@btekum I think you are trying to create a file or modify a file where you do not have permission.
Try sudo before command, if your are modifying or creating a file in Ubuntu VPS.
@btekum can you provide some more information, about what you were doing when you encountered this error?? it is a bit hard to help you at the moment, with so little information
edit: didn't realise there was a comment section when I wrote this as an answer