MAN page from Old RedHat 5.X mount-2.7f-1.i386.rpm
FSTAB
Section: Linux Programmer's Manual (5)
Updated: 27 November 1993
Index NAME
fstab - static information about the filesystems
SYNOPSIS
#include <fstab.h> DESCRIPTION
The file
fstabcontains descriptive information about the various file systems.
fstabis only read by programs, and not written; it is the duty of the systemadministrator to properly create and maintain this file. Each filesystemis described on a separate line; fields on each line are separated by tabsor spaces. The order of records in
fstabis important because
fsck(8),
mount(8), and
umount(8)sequentially iterate through
fstabdoing their thing.
The first field,(fs_spec),describes the block special device orremote filesystem to be mounted.
The second field,(fs_file),describes the mount point for the filesystem. For swap partitions, thisfield should be specified as ``none''.
The third field,(fs_vfstype),describes the type of the filesystem. The system currently supports thesetypes of filesystems (and possibly others - consult/proc/filesystems):
- minix
- a local filesystem, supporting filenames of length 14 or 30 characters.
- ext
- a local filesystem with longer filenames and larger inodes. Thisfilesystem has been replaced by theext2file system, and should no longer be used.
- ext2
- a local filesystem with longer filenames, larger inodes, and lots of otherfeatures.
- xiafs
- a local filesystem with longer filenames, larger inodes, and lots of otherfeatures.
- msdos
- a local filesystem for MS-DOS partitions.
- hpfs
- a local filesystem for HPFS partitions.
- iso9660
- a local filesystem used for CD-ROM drives.
- nfs
- a filesystem for mounting partitions from remote systems.
- swap
- a disk partition to be used for swapping.
Ifvfs_fstypeis specified as ``ignore'' the entry is ignored. This is useful to showdisk 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 leastthe type of mount plus any additional options appropriate to the filesystemtype. For documentation on the available options for non-nfs file systems,seemount(8).For documentation on all nfs-specific options have a look atnfs(5).
The fifth field,(fs_freq),is used for these filesystems by thedump(8)command to determine which filesystems need to be dumped. If the fifthfield is not present, a value of zero is returned anddumpwill assume that the filesystem does not need to be dumped.
The sixth field,(fs_passno),is used by thefsck(8)program to determine the order in which filesystem checks are done atreboot time. The root filesystem should be specified with afs_passnoof 1, and other filesystems should have a fs_passnoof 2. Filesystems within a drive will be checked sequentially, butfilesystems on different drives will be checked at the same time to utilizeparallelism available in the hardware. If the sixth field is not presentor zero, a value of zero is returned andfsckwill assume that the filesystem does not need to be checked.
The proper way to read records fromfstabis to use the routinesgetmntent(3).
FILES
/etc/fstabThe file
fstabresides in
/etc.
BUGS
The documentation in
mount(8)is often more up-to-date.
SEE ALSO
getmntent(3),
mount(8),
swapon(8),
nfs(5)
HISTORY
The
fstabfile format appeared in 4.0BSD.
Index
- NAME
- SYNOPSIS
- DESCRIPTION
- FILES
- BUGS
- SEE ALSO
- HISTORY
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