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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