fsadm - Man Page

• Check a filesystem for errors: fsadm check /dev/vg_name/lv_name
• Simulate resizing to a specific size, without making any changes: fsadm [-n|--dry-run] resize /dev/vg_name/lv_name 10G
• Grow a filesystem to fill the entire device (omit the size): fsadm resize /dev/vg_name/lv_name
• Resize the filesystem and the underlying logical volume together: fsadm [-l|--lvresize] resize /dev/vg_name/lv_name 100G
• For ext2/3/4, unmount and resize offline: fsadm [-e|--ext-offline] resize /dev/vg_name/lv_name 20G

tldr.sh

The fsadm utility checks or resizes the filesystem on a device (which can also be a dm-crypt encrypted device). It tries to use the same API for ext2, ext3, ext4, ReiserFS and XFS filesystems.

-e|--ext-offline

Unmount ext2/ext3/ext4 filesystem before doing resize.

-f|--force

Bypass some sanity checks.

-h|--help

Display the help text.

-l|--lvresize

Also resize the given lvm2 logical volume. More volume management functionality is provided with complementary lvresize(8) and the option -r|--resizefs.

-n|--dry-run

Print commands that would change devices without running them. Read filesystem geometry and perform available read-only checks. Do not mount or unmount filesystems. Offline checks of mounted filesystems and ReiserFS checks that may replay the journal are skipped with a warning. A successful dry run does not guarantee that a later resize will succeed.

-v|--verbose

Be more verbose.

-y|--yes

Answer "yes" at any prompts.

-c|--cryptresize

Resize dm-crypt mapping together with filesystem detected on the device. The dm-crypt device must be recognizable by cryptsetup(8).

new_size[B|K|M|G|T|P|E]

Absolute number of filesystem blocks to be in the filesystem, or an absolute size using a suffix (in powers of 1024). If new_size is not supplied, the whole device is used.

On successful completion, the status code is 0. A status code of 2 indicates the operation was interrupted by the user. A status code of 3 indicates the requested check operation could not be performed because the filesystem is mounted and does not support an online fsck(8). A status code of 1 is used for other failures.

Resize the filesystem on logical volume /dev/vg/test to 1000 MiB. If /dev/vg/test contains ext2/ext3/ext4 filesystem it will be unmounted prior to the resize. All [y/n] questions will be answered 'y'.

fsadm -e -y resize /dev/vg/test 1000M

TMPDIR

The temporary directory name for mount points. Defaults to "/tmp".

DM_DEV_DIR

The device directory name. Defaults to "/dev" and must be an absolute path.

lvm(8), lvresize(8), lvm.conf(5),

fsck(8), tune2fs(8), resize2fs(8),

reiserfstune(8), resize_reiserfs(8),

xfs_info(8), xfs_growfs(8), xfs_check(8),

cryptsetup(8)