hi let's say i fetch 10 files from a server with wget.
then i want to download any modifications to these files. HOWEVER, if a new version of a file is downloaded, i want a backup of the old file (eg. write to <filename>.bak, or possibly <filename>.001 and .002 to keep a record of all versions of a file. can wget do this? i tried to combine -N with -nc, which would seem logical (do timestamp checking, and prevent overwriting), but wget protests that they are mutually exclusive. and if i use no options, then wget fetches a new file even though it's not updated. please help!
