dopus checkdesktop

This command is used when your script has just copied one or more files to
a directory. You pass it the destination path that you copied the files to,
and Opus compares this path with the location of the Desktop folder. If
they are the same, Opus will then scan the Desktop folder and update the
icons on-screen if necessary.

See also:

 dopus getdesktop 
 dopus matchdesktop