答:2.4 kernel以上,可以用mount –bind命令来链接。

 The bind mounts.
              Since Linux 2.4.0 it is possible to remount  part  of  the  file
              hierarchy somewhere else. The call is
                     mount --bind olddir newdir
              or shortoption
                     mount -B olddir newdir
              or fstab entry is:
                     /olddir /newdir none bind

              After  this  call the same contents is accessible in two places.
              One can also remount a single file (on a single file). It's also
              possible  to  use  the  bind mount to create a mountpoint from a
              regular directory, for example:

                     mount --bind foo foo

              The bind mount call attaches only (part of) a single filesystem,
              not possible submounts. The entire file hierarchy including sub‐
              mounts is attached a second place using

                     mount --rbind olddir newdir

              or shortoption
                     mount -R olddir newdir

              Note that the filesystem mount options will remain the  same  as
              those  on  the  original  mount  point, and cannot be changed by
              passing the -o  option  along  with  --bind/--rbind.  The  mount
              options  can be changed by a separate remount command, for exam‐

                     mount --bind olddir newdir
                     mount -o remount,ro newdir

              Note that behavior of  the  remount  operation  depends  on  the
              /etc/mtab  file. The first command stores the 'bind' flag to the
              /etc/mtab file and the second command reads the  flag  from  the
              file.  If you have a system without the /etc/mtab file or if you
              explicitly define source and  target  for  the  remount  command
              (then  mount(8)  does  not read /etc/mtab), then you have to use
              bind flag (or option) for the remount command too. For example:

                     mount --bind olddir newdir
                     mount -o remount,ro,bind olddir newdir



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$sudo mkdir /media/windows
$sudo mkdir /media/mount/