Re: cp command will copy to subdirectory without appending /

[Marc Herbert]

> The problem is dead-simple. You cannot run this command multiple times:
> 
>     cp -R  ./dirfoo  ./dirfoo.backup
> 

Sorry to add yet another (last) off topic message but I must do justice
to GNU cp.  GNU cp actually does support the above thanks to a
(non-standard) option:

     cp -R -T ./dirfoo  ./dirfoo.backup

For details see:  info coreutils "Target Directory"