Provided by: loop-aes-utils_2.13-2_i386 bug

NAME

       fstab - static information about the filesystems

SYNOPSIS

       #include <fstab.h>

DESCRIPTION

       The  file fstab contains descriptive information about the various file
       systems.  fstab is only read by programs, and not written;  it  is  the
       duty  of  the system administrator to properly create and maintain this
       file.  Each filesystem is described on a separate line; fields on  each
       line  are  separated  by  tabs  or spaces.  Lines starting with ’#’ are
       comments.  The order of records in fstab is important because  fsck(8),
       mount(8),  and umount(8) sequentially iterate through fstab doing their
       thing.

       The first field, (fs_spec),  describes  the  block  special  device  or
       remote filesystem to be mounted.

       For  ordinary  mounts  it  will hold (a link to) a block special device
       node (as created by mknod(8))  for  the  device  to  be  mounted,  like
       ‘/dev/cdrom’   or   ‘/dev/sdb7’.    For   NFS   mounts  one  will  have
       <host>:<dir>, e.g., ‘knuth.aeb.nl:/’.  For procfs, use ‘proc’.

       Instead of giving the device explicitly, one may indicate the (ext2  or
       xfs)  filesystem that is to be mounted by its UUID or volume label (cf.
       e2label(8) or  xfs_admin(8)),  writing  LABEL=<label>  or  UUID=<uuid>,
       e.g.,   ‘LABEL=Boot’   or  ‘UUID=3e6be9de-8139-11d1-9106-a43f08d823a6’.
       This will make the system more robust: adding or removing a  SCSI  disk
       changes the disk device name but not the filesystem volume label.

       The  second  field,  (fs_file),  describes  the  mount  point  for  the
       filesystem.  For swap partitions, this field  should  be  specified  as
       ‘none’.  If  the  name  of the mount point contains spaces these can be
       escaped as ‘\040’.

       The third field, (fs_vfstype), describes the type  of  the  filesystem.
       Linux  supports  lots  of filesystem types, such as adfs, affs, autofs,
       coda, coherent, cramfs, devpts, efs, ext2, ext3,  hfs,  hpfs,  iso9660,
       jfs,  minix,  msdos,  ncpfs,  nfs,  ntfs,  proc, qnx4, reiserfs, romfs,
       smbfs, sysv, tmpfs, udf, ufs, umsdos, vfat, xenix,  xfs,  and  possibly
       others.  For more details, see mount(8).  For the filesystems currently
       supported by the running kernel, see /proc/filesystems.  An entry  swap
       denotes a file or partition to be used for swapping, cf. swapon(8).  An
       entry ignore causes the line to be ignored.  This  is  useful  to  show
       disk partitions which are currently unused.

       The  fourth  field, (fs_mntops), describes the mount options associated
       with the filesystem.

       It is formatted as a comma separated list of options.  It  contains  at
       least  the type of mount plus any additional options appropriate to the
       filesystem type.  For documentation on the available options  for  non-
       nfs  file systems, see mount(8).  For documentation on all nfs-specific
       options have a look at nfs(5).  Common for all types of file system are
       the options ‘‘noauto’’ (do not mount when "mount -a" is given, e.g., at
       boot time), ‘‘user’’ (allow a user  to  mount),  and  ‘‘owner’’  (allow
       device  owner  to  mount),  and  ‘‘comment’’  (e.g.,  for use by fstab-
       maintaining programs).   The  ‘‘owner’’  and  ‘‘comment’’  options  are
       Linux-specific.  For more details, see mount(8).

       The  fifth  field,  (fs_freq),  is  used  for  these filesystems by the
       dump(8) command to determine which filesystems need to be  dumped.   If
       the  fifth  field  is not present, a value of zero is returned and dump
       will assume that the filesystem does not need to be dumped.

       The sixth field,  (fs_passno),  is  used  by  the  fsck(8)  program  to
       determine the order in which filesystem checks are done at reboot time.
       The root filesystem should be specified with  a  fs_passno  of  1,  and
       other  filesystems  should have a fs_passno of 2.  Filesystems within a
       drive will be checked sequentially, but filesystems on different drives
       will  be  checked  at the same time to utilize parallelism available in
       the hardware.  If the sixth field is not present or zero,  a  value  of
       zero is returned and fsck will assume that the filesystem does not need
       to be checked.

       The proper way to read records  from  fstab  is  to  use  the  routines
       getmntent(3).

FILES

       /etc/fstab

SEE ALSO

       getmntent(3), mount(8), swapon(8), fs(5) nfs(5)

HISTORY

       The ancestor of this fstab file format appeared in 4.0BSD.

AVAILABILITY

       This  man  page  is  part of the util-linux-ng package and is available
       from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.