菜鸟问题1 etc/vfstab是做什么的

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etc/vfstab这个文件是做什么的

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# man vfstab
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File Formats                                            vfstab(4)

NAME
     vfstab - table of file system defaults

DESCRIPTION
     The file /etc/vfstab describes defaults for each  file  sys-
     tem. The information is stored in a table with the following
     column headings:

     device       device       mount      FS      fsck    mount      mount
     to mount     to fsck      point      type    pass    at boot    options

     The fields in the table are  space-separated  and  show  the
     resource  name  (device  to  mount),  the raw device to fsck
     (device to fsck), the default mount directory (mount point),
     the  name of the file system type (FS type), the number used
     by fsck to decide whether to check the file system automati-
     cally (fsck pass), whether the file system should be mounted
     automatically by mountall (mount at boot), and the file sys-
     tem  mount  options  (mount  options). (See respective mount
     file system man page below in SEE ALSO for mount options.) A
     '-'  is  used  to  indicate no entry in a field. This may be
     used when a field does  not  apply  to  the  resource  being
     mounted.

     The getvfsent(3C) family of routines is  used  to  read  and
     write to /etc/vfstab.

     /etc/vfstab can be used to specify swap areas. An  entry  so
     specified, (which can be a file or a device), will automati-
     cally be added as a swap area by  the  /sbin/swapadd  script
     when  the  system boots. To specify a swap area, the device-
     to-mount field contains the name of the swap file or device,
     the  FS-type  is "swap", mount-at-boot is "no" and all other
     fields have no entry.