xfs_admin - change parameters of an XFS filesystem


SYNOPSIS

       xfs_admin [ -lu] [ -L label ] [ -U uuid ] device
       xfs_admin -f [ -lu] [ -L label ] [ -U uuid ] filename


DESCRIPTION

       xfs_admin  uses  the  xfs_db(8)  command to modify various
       parameters of a filesystem.

       Devices that are mounted cannot be modified.   Administra­
       tors  must  unmount filesystems before xfs_admin or xfs_db
       can convert parameters.   A  number  of  parameters  of  a
       mounted  filesystem can be examined and modified using the
       xfs_growfs(8) command.


OPTIONS

       -f   Specifies that the filesystem image to  be  processed
            is stored in a regular file (see the mkfs.xfs -d file
            option).

       -l   Print the current filesystem label.

       -u   Print the current filesystem UUID (Universally Unique
            IDentifier).

       -L label
            Set  the filesystem label.  XFS filesystem labels can
            be at most 12 characters long;  if  label  is  longer
            than  12  characters,  xfs_admin will truncate it and
            print a warning message.  The filesystem label can be
            cleared using the special ``--'' value for label.

       -U UUID
            Set  the UUID of the filesystem.  A sample UUID looks
            like  this:   "c1b9d5a2-f162-11cf-9ece-0020afc76f16".
            The  uuid  may  also  be  null,  which  will  set the
            filesystem UUID to the null UUID.  The uuid may  also
            be  generate,  which will generate a new UUID for the
            filesystem.

       The  mount(8)  manual  entry  describes  how  to  mount  a
       filesystem  using its label or UUID, rather than its block
       special device name.


SEE ALSO

       mkfs.xfs(8), mount(8), xfs_db(8), xfs_growfs(8), xfs(5).


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