fstab檔案欄位小結
阿新 • • 發佈：2018-12-27
[[email protected] etc]# more fstab
LABEL=/ / ext3 defaults 1 1
LABEL=/boot /boot ext3 defaults 1 2
LABEL=/data /data ext3 defaults 1 2
devpts /dev/pts devpts gid=5,mode=620 0 0
tmpfs /dev/shm tmpfs defaults 0 0
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
LABEL=SWAP-sda3 swap swap defaults 0 0
[[email protected] etc]# man fstab
FSTAB(5) Linux Programmer's Manual FSTAB(5)
NAME
fstab - static information about the filesystems
SYNOPSIS
#include <fstab.h>
DESCRIPTION
The file fstab contains descriptive information about the various file systems. It is the duty of the system administrator to prop-
erly create and maintain this file. fstab can be modified by special utils (e.g. fstab-sync(8)). 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, reis-
erfs, 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 cur-
rently 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), ''owner'' (allow device owner to mount), ''pamconsole'' (allow a
user at the console to mount), and ''comment'' (e.g., for use by fstab-maintaining programs). The ''owner'', ''pamconsole'' 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 paral-
lelism 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) fstab-sync(8)
HISTORY
The ancestor of this fstab file format appeared in 4.0BSD.
Linux 2.2 15 June 1999 FSTAB(5)
[
E2LABEL(8) E2LABEL(8)
NAME
e2label - Change the label on an ext2/ext3 filesystem
SYNOPSIS
e2label device [ new-label ]
DESCRIPTION
e2label will display or change the filesystem label on the ext2 filesystem located on device.
If the optional argument new-label is not present, e2label will simply display the current filesystem label.
If the optional argument new-label is present, then e2label will set the filesystem label to be new-label. Ext2 filesystem labels can
be at most 16 characters long; if new-label is longer than 16 characters, e2label will truncate it and print a warning message.
It is also possible to set the filesystem label using the -L option of tune2fs(8).
AUTHOR
e2label was written by Theodore Ts'o (
AVAILABILITY
e2label is part of the e2fsprogs package and is available from http://e2fsprogs.sourceforge.net.
SEE ALSO
mke2fs(8), tune2fs(8)
E2fsprogs version 1.39 May 2006 E2LABEL(8)
filesystem volume label
LABEL=/ / ext3 defaults 1 1
LABEL=/boot /boot ext3 defaults 1 2
LABEL=/data /data ext3 defaults 1 2
devpts /dev/pts devpts gid=5,mode=620 0 0
tmpfs /dev/shm tmpfs defaults 0 0
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
LABEL=SWAP-sda3 swap swap defaults 0 0
1.硬碟（使用檔案系統卷標表示）
2.掛載點
3.檔案系統型別
4.掛載選項（引數）
5.是否備份
6.開機是否檢查（root為1）
[[email protected] etc]# man fstab
FSTAB(5) Linux Programmer's Manual FSTAB(5)
NAME
fstab - static information about the filesystems
SYNOPSIS
#include <fstab.h>
DESCRIPTION
The file fstab contains descriptive information about the various file systems. It is the duty of the system administrator to prop-
erly create and maintain this file. fstab can be modified by special utils (e.g. fstab-sync(8)). 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, reis-
erfs, 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 cur-
rently 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), ''owner'' (allow device owner to mount), ''pamconsole'' (allow a
user at the console to mount), and ''comment'' (e.g., for use by fstab-maintaining programs). The ''owner'', ''pamconsole'' 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 paral-
lelism 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) fstab-sync(8)
HISTORY
The ancestor of this fstab file format appeared in 4.0BSD.
Linux 2.2 15 June 1999 FSTAB(5)
[
E2LABEL(8) E2LABEL(8)
NAME
e2label - Change the label on an ext2/ext3 filesystem
SYNOPSIS
e2label device [ new-label ]
DESCRIPTION
e2label will display or change the filesystem label on the ext2 filesystem located on device.
If the optional argument new-label is not present, e2label will simply display the current filesystem label.
If the optional argument new-label is present, then e2label will set the filesystem label to be new-label. Ext2 filesystem labels can
be at most 16 characters long; if new-label is longer than 16 characters, e2label will truncate it and print a warning message.
It is also possible to set the filesystem label using the -L option of tune2fs(8).
AUTHOR
e2label was written by Theodore Ts'o (
AVAILABILITY
e2label is part of the e2fsprogs package and is available from http://e2fsprogs.sourceforge.net.
SEE ALSO
mke2fs(8), tune2fs(8)
E2fsprogs version 1.39 May 2006 E2LABEL(8)
filesystem volume label