tune2fs

TLDR

Set max mount count before check

$ sudo tune2fs -c 2 /dev/sdXN

Set filesystem label

$ sudo tune2fs -L 'MY_LABEL' /dev/sdXN

Enable discard and extended attributes

$ sudo tune2fs -o discard,user_xattr /dev/sdXN

Enable journaling

$ sudo tune2fs -o has_journal /dev/sdXN

Assign new random UUID

$ sudo tune2fs -U random /dev/sdXN

Set reserved blocks percentage

$ sudo tune2fs -m 1 /dev/sdXN

SYNOPSIS

tune2fs [options] device

DESCRIPTION

tune2fs adjusts tunable filesystem parameters on ext2, ext3, or ext4 filesystems. Many parameters can be changed on mounted filesystems, but some require the filesystem to be unmounted.

PARAMETERS

-c MAX-MOUNT-COUNTS

Set maximum mount count before fsck

-C MOUNT-COUNT

Set current mount count

-e ERROR-BEHAVIOR

Set error behavior (continue, remount-ro, panic)

-E EXTENDED-OPTIONS

Set extended options

-f

Force operation on filesystems with errors

-i INTERVAL

Time between filesystem checks (d/w/m for days/weeks/months)

-j

Add ext3 journal to ext2 filesystem

-J JOURNAL-OPTIONS

Set journal options

-l

List filesystem superblock contents

-L LABEL

Set filesystem label

-m RESERVED-BLOCKS-PERCENTAGE

Set percentage of reserved blocks

-o OPTIONS

Set/clear default mount options

-O FEATURES

Set/clear filesystem features

-r RESERVED-BLOCKS-COUNT

Set number of reserved blocks

-T TIME

Set time of last filesystem check

-u USER

Set user who can use reserved blocks

-U UUID

Set filesystem UUID

CAVEATS

Some changes require unmounting the filesystem. Changing certain features incorrectly can make the filesystem unmountable. Always backup important data before making changes.

HISTORY

tune2fs is part of e2fsprogs, the ext2/3/4 filesystem utilities package.