〈 switch〉 can be one of the switches described below.
For example `-od' selects the `overwrite only if
different' option. The meanings of the various
options are explained in greater detail elsewhere in
this manual. If no switch in a group is given, the one
shown in upper case is used.
Overwrite option: [ o | OO | od | no ]
o: overwrite on
OO: OVERWRITE ONLY IF OLDER
od: overwrite only if different
no: never overwrite
Subfolders option: [ SUB | nsub ]
SUB: COPY SUBFOLDERS
nsub: copy files only, not subfolders