execute a command as another user

copy files and set attributes

-m, --mode=MODE
       set permission mode (as in chmod), instead of rwxr-xr-x

-o, --owner=OWNER
       set ownership (super-user only)

-g, --group=GROUP
       set group ownership, instead of process' current group

-t, --target-directory=DIRECTORY
       copy all SOURCE arguments into DIRECTORY