CheckDebug prints the debug msg with the prefix 'Debug:'.

CheckErrFatal prints the msg with the prefix 'Error:' and exits with error code 1.

CheckErrNonFatal prints the msg with the prefix 'Error:' but does not exit the code.

CopyDirectory copies content of one directory to another.

CreateFile checks if the file already exists, if not then will create it and set it up.

Exists returns whether the given file or directory exists, returns true if location exists.