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updfstab(8)                      Red Hat Linux                     updfstab(8)

       updfstab - update /etc/fstab to reflect removable devices

       updfstab [-nt] [--usage]

       updfstab  is  designed  to  keep /etc/fstab consistent with the devices
       plugged into your system. It looks for devices such as cdroms, zip  and
       jaz  drives,  ls120  drives,  and  digital  cameras on the SCSI and IDE
       buses. USB devices look like SCSI devices to user space, so  those  are
       supported as well, but are only added if they are currently attached to
       the system (having a scsi device assigned to them is not sufficient).

       Devices which updfstab adds to /etc/fstab are  marked  with  the  kudzu
       mount option to distinguish them from other devices.  updfstab will not
       remove devices from /etc/fstab unless they are marked  with  the  kudzu
       mount  option.  It  also  ignores  devices  that  are already listed in
       /etc/fstab, or which have multiple partitions on  the  media  currently
       inserted (except when ignoremulti is used).

              Use  the configuration specified by path, rather then /etc/updf-


              Normally, updfstab tries to touch /etc/fstab as little as possi-
              ble.  When this option is given, it will instead move all of the
              devices with the kudzu mount option to the end of the file,  and
              will  list  the  devices  in  the  same order the internal probe


              When this option is  specified,  updstab  does  not  update  the
              /etc/fstab file. Instead, it displays the fstab entries it would
              use to standard out. If no changes need to be made,  it  outputs
              the string (nothing to do) rather then a full filesystem table.

       The devices updfstab looks for are specified by its configuration file,
       /etc/updfstab.conf by default. It defines a  number  of  devices  which
       updfstab looks for on the system, along with various attributes of that
       device. If a single device name is given multiple times,  later  values
       override those given earlier. However, match directives accumulate; all
       specified matches remain in effect for that device.  The default  value
       of flags may be changed by specifying a new value for that flag outside
       of any device  section,  which  changes  the  default  for  all  future

       A simple configuration file looks like this:
       # sample updfstab configuration file
       symlink false

       device cdrom {
           symlink true
           match cdrom

       device zip {
           match hd zip
           match floppy "zip"

       Here  two  devices  are  specified, cdrom and zip. If a cdrom device is
       found on the system, a /dev/cdrom is created pointing to the /dev entry
       for  the  device, and /mnt/cdrom is added to /etc/fstab. The next entry
       looks for hard drive devices with zip in their description as  well  as
       floppy  devices  with  zip  in  their  description.  If either is found
       /mnt/zip is added to /etc/fstab, but no symlink is created.

       Here is the complete list of directives which may be used:

       device name
              Set attributes for device name name. The name  is  used  in  the
              /etc/fstab entry and for any symbolic links which are created.

       include path
              Parsing  of  the  current configuration file is stopped, and the
              file specified by path is read for current configuration  infor-
              mation.   Multiple include directives may be given, but they may
              not appear inside of device sections.

       ignoremulti val
              If val is true, updfstab will not skip the device,  even  if  it
              has   multiple  partitions,  and  will  add  a  mount  entry  to
              /etc/fstab, using the partition specified in the config file.

       match class string
              This directive adds a new rule for  this  device  type;  devices
              found  on  the  system  which  match  this rule are considered a
              device of the type whose section the match directive appears in.
              The  class  must  be cdrom, floppy, or hd. If string appears, it
              must be a substring of the physical device's description for the
              rule to match.

       nofstab val
              If  val  is  true,  updfstab  does  not  add  a  mount  entry to
              /etc/fstab. This is mainly useful in conjunction with symlink.

       partition num
              Specifies a default partition number  which  should  be  mounted
              from  this  device.  If  0 is used, no partition number appears.
              updfstab always scans /proc/partitions for the proper  partition
              number before relying on this value.

       skip val
              The  device  entry  is  skipped.  This lets a configuration file
              undefine a device that  was  defined  earlier  (such  as  in  an
              included file). val should be true or false.

       symlink val
              If  val  is  true,  updfstab creates a symbolic link in the /dev
              directory pointing to the actual device. This symbolic  link  is
              then used in /etc/fstab.



       Erik Troan <ewtATredhat.com>

Red Hat, Inc.                     29 Jan 2003                      updfstab(8)