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32 .\" @(#)fstab.5 6.5 (Berkeley) 5/10/91
34 .\" Modified Sat Mar 6 20:45:03 1993, faith@cs.unc.edu, for Linux
35 .\" Sat Oct 9 10:07:10 1993: converted to man format by faith@cs.unc.edu
36 .\" Sat Nov 20 20:47:38 1993: hpfs documentation added
37 .\" Sat Nov 27 20:23:32 1993: Updated authorship information
38 .\" Wed Jul 26 00:00:00 1995: Updated some nfs stuff, joey@infodrom.north.de
39 .\" Tue Apr 2 00:38:28 1996: added info about "noauto", "user", etc.
40 .\" Tue Jun 15 20:02:18 1999: added LABEL and UUID
41 .\" Sat Jul 14 2001: Michael K. Johnson <johnsonm@redhat.com> added -O
43 .TH FSTAB 5 "15 June 1999" "Linux 2.2" "Linux Programmer's Manual"
45 fstab \- static information about the filesystems
51 contains descriptive information about the various file systems.
53 is only read by programs, and not written; it is the duty of the system
54 administrator to properly create and maintain this file. Each filesystem
55 is described on a separate line; fields on each line are separated by tabs
56 or spaces. Lines starting with '#' are comments. The order of records in
63 sequentially iterate through
69 describes the block special device or
70 remote filesystem to be mounted.
72 For ordinary mounts it will hold (a link to) a block special
73 device node (as created by
75 for the device to be mounted, like `/dev/cdrom' or `/dev/sdb7'.
76 For NFS mounts one will have <host>:<dir>, e.g., `knuth.aeb.nl:/'.
77 For procfs, use `proc'.
79 Instead of giving the device explicitly, one may indicate
80 the (ext2 or xfs) filesystem that is to be mounted by its UUID or
85 writing LABEL=<label> or UUID=<uuid>,
86 e.g., `LABEL=Boot' or `UUID=3e6be9de\%-8139\%-11d1\%-9106\%-a43f08d823a6'.
87 This will make the system more robust: adding or removing a SCSI disk
88 changes the disk device name but not the filesystem volume label.
92 describes the mount point for the filesystem. For swap partitions, this
93 field should be specified as `none'. If the name of the mount point
94 contains spaces these can be escaped as `\\040'.
98 describes the type of the filesystem. Linux supports lots
99 of filesystem types, such as
132 and possibly others. For more details, see
134 For the filesystems currently supported by the running kernel, see
135 .IR /proc/filesystems .
138 denotes a file or partition to be used
143 causes the line to be ignored. This is useful
144 to show disk partitions which are currently unused.
147 is useful for bind or move mounts.
151 describes the mount options associated with the filesystem.
153 It is formatted as a comma separated list of options. It contains at least
154 the type of mount plus any additional options appropriate to the filesystem
155 type. For documentation on the available options for non-nfs file systems,
158 For documentation on all nfs-specific options have a look at
160 Common for all types of file system are the options ``noauto''
161 (do not mount when "mount -a" is given, e.g., at boot time), ``user''
162 (allow a user to mount), and ``owner''
163 (allow device owner to mount), and ``comment''
164 (e.g., for use by fstab-maintaining programs).
165 The ``owner'' and ``comment'' options are Linux-specific.
166 For more details, see
171 is used for these filesystems by the
173 command to determine which filesystems need to be dumped. If the fifth
174 field is not present, a value of zero is returned and
176 will assume that the filesystem does not need to be dumped.
182 program to determine the order in which filesystem checks are done at
183 reboot time. The root filesystem should be specified with a
185 of 1, and other filesystems should have a
187 of 2. Filesystems within a drive will be checked sequentially, but
188 filesystems on different drives will be checked at the same time to utilize
189 parallelism available in the hardware. If the sixth field is not present
190 or zero, a value of zero is returned and
192 will assume that the filesystem does not need to be checked.
194 The proper way to read records from
196 is to use the routines
209 file format appeared in 4.0BSD.
210 .\" But without comment convention, and options and vfs_type.
211 .\" Instead there was a type rw/ro/rq/sw/xx, where xx is the present 'ignore'.
213 This man page is part of the util-linux-ng package and is available from
214 ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.