# man > vgmknodes(8)

[_VGMKNODES_(8)](https://www.chedong.com/phpMan.php/man/VGMKNODES/8/markdown)                           System Manager's Manual                          [_VGMKNODES_(8)](https://www.chedong.com/phpMan.php/man/VGMKNODES/8/markdown)

## NAME
       vgmknodes — Create the special files for volume group devices in /dev

## SYNOPSIS
### vgmknodes
           [ _option_args_ ]
           [ _position_args_ ]

## DESCRIPTION
       vgmknodes  checks the LVM device nodes in /dev that are needed for active LVs and creates any
       that are missing and removes unused ones.

       This command should not usually be needed if all the  system  components  are  interoperating
       correctly.

## USAGE
### vgmknodes
           [    **--ignorelockingfailure **]
           [    **--refresh **]
           [    **--reportformat basic**|**json **]
           [ COMMON_OPTIONS ]
           [ _VG_|_LV_|_Tag_ ... ]

       Common options for lvm:
           [ **-d**|**--debug **]
           [ **-h**|**--help **]
           [ **-q**|**--quiet **]
           [ **-t**|**--test **]
           [ **-v**|**--verbose **]
           [ **-y**|**--yes **]
           [    **--commandprofile _**String_ ]
           [    **--config _**String_ ]
           [    **--devices _**PV_ ]
           [    **--devicesfile _**String_ ]
           [    **--driverloaded y**|**n **]
           [    **--journal _**String_ ]
           [    **--lockopt _**String_ ]
           [    **--longhelp **]
           [    **--nohints **]
           [    **--nolocking **]
           [    **--profile _**String_ ]
           [    **--version **]

## OPTIONS


       **--commandprofile _**String_
              The command profile to use for command configuration.  See [**lvm.conf**(5)](https://www.chedong.com/phpMan.php/man/lvm.conf/5/markdown) for more infor‐
              mation about profiles.

       **--config _**String_
              Config  settings for the command. These override [**lvm.conf**(5)](https://www.chedong.com/phpMan.php/man/lvm.conf/5/markdown) settings.  The String arg
              uses the same format as [**lvm.conf**(5)](https://www.chedong.com/phpMan.php/man/lvm.conf/5/markdown), or may use section/field syntax.  See [**lvm.conf**(5)](https://www.chedong.com/phpMan.php/man/lvm.conf/5/markdown)
              for more information about config.

### -d --debug 
              Set debug level. Repeat from 1 to 6 times to increase the detail of messages  sent  to
              the log file and/or syslog (if configured).

       **--devices _**PV_
              Restricts  the  devices  that  are visible and accessible to the command.  Devices not
              listed will appear to be missing. This option can be repeated, or accepts a comma sep‐
              arated list of devices. This overrides the devices file.

       **--devicesfile _**String_
              A file listing devices that LVM should use.  The file must exist in  _/etc/lvm/devices/_
              and  is  managed  with  the [**lvmdevices**(8)](https://www.chedong.com/phpMan.php/man/lvmdevices/8/markdown) command.  This overrides the [**lvm.conf**(5)](https://www.chedong.com/phpMan.php/man/lvm.conf/5/markdown) **de‐**
              **vices/devicesfile **and **devices/use_devicesfile **settings.

       **--driverloaded y**|**n**
              If set to no, the command will not attempt to use device-mapper.  For testing and  de‐
              bugging.

### -h --help
              Display help text.

### --ignorelockingfailure
              Allows  a  command  to continue with read-only metadata operations after locking fail‐
              ures.

       **--journal _**String_
              Record information in the systemd journal.  This information is in addition to  infor‐
              mation enabled by the lvm.conf log/journal setting.  command: record information about
              the  command.   output: record the default command output.  debug: record full command
              debugging.

       **--lockopt _**String_
              Used to pass options for special cases to lvmlockd.  See [**lvmlockd**(8)](https://www.chedong.com/phpMan.php/man/lvmlockd/8/markdown) for more informa‐
              tion.

### --longhelp
              Display long help text.

### --nohints
              Do not use the hints file to locate devices for PVs. A command may read  more  devices
              to find PVs when hints are not used. The command will still perform standard hint file
              invalidation where appropriate.

### --nolocking
              Disable  locking. Use with caution, concurrent commands may produce incorrect results.


       **--profile _**String_
              An alias for --commandprofile or --metadataprofile, depending on the command.

### -q --quiet 
              Suppress output and log messages. Overrides --debug and  --verbose.   Repeat  once  to
              also suppress any prompts with answer 'no'.

### --refresh
              If  the LV is active, reload its metadata.  This is not necessary in normal operation,
              but may be useful if something has gone wrong, or if some form of manual LV sharing is
              being used.

       **--reportformat basic**|**json**
              Overrides current output format for reports which  is  defined  globally  by  the  re‐
              port/output_format  setting in [**lvm.conf**(5)](https://www.chedong.com/phpMan.php/man/lvm.conf/5/markdown).  **basic **is the original format with columns
              and rows.  If there is more than one report per command, each report is prefixed  with
              the  report  name  for identification. **json **produces report output in JSON format. See
              [**lvmreport**(7)](https://www.chedong.com/phpMan.php/man/lvmreport/7/markdown) for more information.

### -t --test
              Run in test mode. Commands will not update metadata.  This is implemented by disabling
              all metadata writing but nevertheless returning success to the calling function.  This
              may lead to unusual error messages in multi-stage operations if a tool relies on read‐
              ing back metadata it believes has changed but hasn't.

### -v --verbose 
              Set verbose level. Repeat from 1 to 4 times to increase the detail of messages sent to
              stdout and stderr.

### --version
              Display version information.

### -y --yes
              Do  not  prompt  for  confirmation interactively but always assume the answer yes. Use
              with extreme caution.  (For automatic no, see -qq.)

## VARIABLES
       _VG_     Volume Group name.  See [**lvm**(8)](https://www.chedong.com/phpMan.php/man/lvm/8/markdown) for valid names.

       _LV_     Logical Volume name.  See [**lvm**(8)](https://www.chedong.com/phpMan.php/man/lvm/8/markdown) for valid names.  An LV positional arg generally  in‐
              cludes the VG name and LV name, e.g. VG/LV.

       _Tag_    Tag name.  See [**lvm**(8)](https://www.chedong.com/phpMan.php/man/lvm/8/markdown) for information about tag names and using tags in place of a VG,
              LV or PV.

       _String_ See the option description for information about the string content.

       _Size_[UNIT]
              Size is an input number that accepts an optional unit.  Input units are always treated
              as base two values, regardless of capitalization, e.g. 'k' and 'K' both refer to 1024.
              The  default  input  unit  is specified by letter, followed by |UNIT.  UNIT represents
              other possible input units: **b**|**B **is bytes, **s**|**S **is sectors of 512 bytes, **k**|**K **is KiB, **m**|**M**
              is MiB, **g**|**G **is GiB, **t**|**T **is TiB, **p**|**P **is PiB, **e**|**E **is EiB.  (This should not be  confused
              with the output control --units, where capital letters mean multiple of 1000.)

## ENVIRONMENT VARIABLES
       See [**lvm**(8)](https://www.chedong.com/phpMan.php/man/lvm/8/markdown) for information about environment variables used by lvm.  For example, LVM_VG_NAME
       can generally be substituted for a required VG parameter.

## SEE ALSO
       [**lvm**(8)](https://www.chedong.com/phpMan.php/man/lvm/8/markdown), [**lvm.conf**(5)](https://www.chedong.com/phpMan.php/man/lvm.conf/5/markdown), [**lvmconfig**(8)](https://www.chedong.com/phpMan.php/man/lvmconfig/8/markdown), [**lvmdevices**(8)](https://www.chedong.com/phpMan.php/man/lvmdevices/8/markdown),

       [**pvchange**(8)](https://www.chedong.com/phpMan.php/man/pvchange/8/markdown), [**pvck**(8)](https://www.chedong.com/phpMan.php/man/pvck/8/markdown), [**pvcreate**(8)](https://www.chedong.com/phpMan.php/man/pvcreate/8/markdown), [**pvdisplay**(8)](https://www.chedong.com/phpMan.php/man/pvdisplay/8/markdown), [**pvmove**(8)](https://www.chedong.com/phpMan.php/man/pvmove/8/markdown), [**pvremove**(8)](https://www.chedong.com/phpMan.php/man/pvremove/8/markdown), [**pvresize**(8)](https://www.chedong.com/phpMan.php/man/pvresize/8/markdown), [**pvs**(8)](https://www.chedong.com/phpMan.php/man/pvs/8/markdown),
       [**pvscan**(8)](https://www.chedong.com/phpMan.php/man/pvscan/8/markdown),

       [**vgcfgbackup**(8)](https://www.chedong.com/phpMan.php/man/vgcfgbackup/8/markdown), [**vgcfgrestore**(8)](https://www.chedong.com/phpMan.php/man/vgcfgrestore/8/markdown), [**vgchange**(8)](https://www.chedong.com/phpMan.php/man/vgchange/8/markdown), [**vgck**(8)](https://www.chedong.com/phpMan.php/man/vgck/8/markdown), [**vgcreate**(8)](https://www.chedong.com/phpMan.php/man/vgcreate/8/markdown), [**vgconvert**(8)](https://www.chedong.com/phpMan.php/man/vgconvert/8/markdown),
       [**vgdisplay**(8)](https://www.chedong.com/phpMan.php/man/vgdisplay/8/markdown), [**vgexport**(8)](https://www.chedong.com/phpMan.php/man/vgexport/8/markdown), [**vgextend**(8)](https://www.chedong.com/phpMan.php/man/vgextend/8/markdown), [**vgimport**(8)](https://www.chedong.com/phpMan.php/man/vgimport/8/markdown), [**vgimportclone**(8)](https://www.chedong.com/phpMan.php/man/vgimportclone/8/markdown), [**vgimportdevices**(8)](https://www.chedong.com/phpMan.php/man/vgimportdevices/8/markdown),
       [**vgmerge**(8)](https://www.chedong.com/phpMan.php/man/vgmerge/8/markdown), [**vgmknodes**(8)](https://www.chedong.com/phpMan.php/man/vgmknodes/8/markdown), [**vgreduce**(8)](https://www.chedong.com/phpMan.php/man/vgreduce/8/markdown), [**vgremove**(8)](https://www.chedong.com/phpMan.php/man/vgremove/8/markdown), [**vgrename**(8)](https://www.chedong.com/phpMan.php/man/vgrename/8/markdown), [**vgs**(8)](https://www.chedong.com/phpMan.php/man/vgs/8/markdown), [**vgscan**(8)](https://www.chedong.com/phpMan.php/man/vgscan/8/markdown),
       [**vgsplit**(8)](https://www.chedong.com/phpMan.php/man/vgsplit/8/markdown),

       [**lvcreate**(8)](https://www.chedong.com/phpMan.php/man/lvcreate/8/markdown), [**lvchange**(8)](https://www.chedong.com/phpMan.php/man/lvchange/8/markdown), [**lvconvert**(8)](https://www.chedong.com/phpMan.php/man/lvconvert/8/markdown), [**lvdisplay**(8)](https://www.chedong.com/phpMan.php/man/lvdisplay/8/markdown), [**lvextend**(8)](https://www.chedong.com/phpMan.php/man/lvextend/8/markdown), [**lvreduce**(8)](https://www.chedong.com/phpMan.php/man/lvreduce/8/markdown), [**lvremove**(8)](https://www.chedong.com/phpMan.php/man/lvremove/8/markdown),
       [**lvrename**(8)](https://www.chedong.com/phpMan.php/man/lvrename/8/markdown), [**lvresize**(8)](https://www.chedong.com/phpMan.php/man/lvresize/8/markdown), [**lvs**(8)](https://www.chedong.com/phpMan.php/man/lvs/8/markdown), [**lvscan**(8)](https://www.chedong.com/phpMan.php/man/lvscan/8/markdown),

       [**lvm-fullreport**(8)](https://www.chedong.com/phpMan.php/man/lvm-fullreport/8/markdown), [**lvm-lvpoll**(8)](https://www.chedong.com/phpMan.php/man/lvm-lvpoll/8/markdown), [**blkdeactivate**(8)](https://www.chedong.com/phpMan.php/man/blkdeactivate/8/markdown), [**lvmdump**(8)](https://www.chedong.com/phpMan.php/man/lvmdump/8/markdown),

       [**dmeventd**(8)](https://www.chedong.com/phpMan.php/man/dmeventd/8/markdown), [**lvmpolld**(8)](https://www.chedong.com/phpMan.php/man/lvmpolld/8/markdown), [**lvmlockd**(8)](https://www.chedong.com/phpMan.php/man/lvmlockd/8/markdown), [**lvmlockctl**(8)](https://www.chedong.com/phpMan.php/man/lvmlockctl/8/markdown), [**cmirrord**(8)](https://www.chedong.com/phpMan.php/man/cmirrord/8/markdown), [**lvmdbusd**(8)](https://www.chedong.com/phpMan.php/man/lvmdbusd/8/markdown), [**fsadm**(8)](https://www.chedong.com/phpMan.php/man/fsadm/8/markdown),

       [**lvmsystemid**(7)](https://www.chedong.com/phpMan.php/man/lvmsystemid/7/markdown), [**lvmreport**(7)](https://www.chedong.com/phpMan.php/man/lvmreport/7/markdown), [**lvmraid**(7)](https://www.chedong.com/phpMan.php/man/lvmraid/7/markdown), [**lvmthin**(7)](https://www.chedong.com/phpMan.php/man/lvmthin/7/markdown), [**lvmcache**(7)](https://www.chedong.com/phpMan.php/man/lvmcache/7/markdown)

Red Hat, Inc.                     LVM TOOLS [2.03.16(2)](https://www.chedong.com/phpMan.php/man/2.03.16/2/markdown) (2022-05-18)                     [_VGMKNODES_(8)](https://www.chedong.com/phpMan.php/man/VGMKNODES/8/markdown)