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[root@localhost ~]# fdisk -l

Disk /dev/sda: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        1304    10474348+   7  HPFS/NTFS
/dev/sda2            1305        1317      104422+  83  Linux
/dev/sda3            1318        1578     2096482+  82  Linux swap / Solaris
/dev/sda4            1579        2610     8289540    5  Extended
/dev/sda5            1579        1709     1052226   83  Linux
/dev/sda6            1710        2610     7237251   83  Linux

[root@localhost ~]# df -lh
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda6             6.7G  3.5G  3.0G  54% /-----------------------------这里有网站的程序
/dev/sda5             996M   34M  911M   4% /tmp
/dev/sda2              99M   12M   83M  13% /boot
tmpfs                 125M     0  125M   0% /dev/shm

请教一下，如何把多余的磁盘，挂载到/dev/sda6区。