man mount:
Since Linux 2.4.0 it is possible to remount part of the file hierarchy somewhere else. The call
is
mount --bind olddir newdir
After this call the same contents is accessible in two places. One can also remount a single
file (on a single file).
This call attaches only (part of) a single filesystem, not possible submounts. The entire file
hierarchy including submounts is attached a second place using
mount --rbind olddir newdir
Donc "r" plutot pour "recursive".
Pour le coup du fstab, perso j'ai mis deux mots dans Google, rbind et fstab, et le premier résultat m'a donné la réponse...
