File-system mount options

As the filesystems in /etc/fstab will eventually be mounted using mount(8) it isn't surprising that the options field simply contains a comma-seperated list of options which will be passed directly to mount when it tries to mount the filesystem.

The options common to all filesystems are:

sync / async

All I/O to the file system should be done (a)synchronously.

auto

The filesystem can be mounted automatically (at bootup, or when mount is passed the -a option). This is really unnecessary as this is the default action of mount -a anyway.

noauto

The filesystem will NOT be automatically mounted at startup, or when mount passed -a. You must explicitly mount the filesystem.

dev / nodev

Permit any user to mount the filesyste. This automatically implies noexec,

exec / noexec

Permit/Prevent the execution of binaries from the filesystem.

suid / nosuid

Permit/Block the operation of suid, and sgid bits.

ro

Mount read-only.

rw

Mount read-write.

user

Permit any user to mount the filesystem. This automatically implies noexec, nosuid,nodev unless overridden.

nouser

Only permit root to mount the filesystem. This is also a default setting.

defaults

Use default settings. Equivalent to rw,suid,dev,exec,auto,nouser,async.

• ext2
  check={none, normal, strict}
  Sets the fsck checking level.
  debug
  print debugging info on each remount.
  sb=n
  n is the block which should be used as the superblock for the fs.

  fat

  check={r[elaxed], n[ormal], s[trict]}

  Not the same as ext2. Rather deals with allowed filenames. See mount(8).

  conv={b[inary], t[ext], a[uto]}

  Performs DOS<->UNIX text file conversions automatically. See mount(8).

  uid=n, gid=n

  Set the uid, gid for all files on the filesystem.

  iso9660

  norock

  Disables Rock Ridge extensions.

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