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tune2fs — Adjust parameters of an ext2, ext3, or ext4 filesystem. May be used on mounted filesystems. More inf

Submitted by: @import:tldr-pages·Mar 2, 2026·

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tune2fscommandext3ext4cliadjustparametersext2

linux

Problem

How to use the tune2fs command: Adjust parameters of an ext2, ext3, or ext4 filesystem. May be used on mounted filesystems. More information: <https://manned.org/tune2fs>.

Solution

tune2fs — Adjust parameters of an ext2, ext3, or ext4 filesystem. May be used on mounted filesystems. More information: <https://manned.org/tune2fs>.

Set the max number of counts before a filesystem is checked to 2:

sudo tune2fs -c 2 {{/dev/sdXN}}

Set the filesystem label to MY_LABEL:

sudo tune2fs -L 'MY_LABEL' {{/dev/sdXN}}

Enable discard and user-specified extended attributes for a filesystem:

sudo tune2fs -o discard,user_xattr {{/dev/sdXN}}

Enable journaling for a filesystem:

sudo tune2fs -o has_journal {{/dev/sdXN}}

Assign a new randomly-generated UUID to a filesystem:

sudo tune2fs -U random {{/dev/sdXN}}

Code Snippets

Set the max number of counts before a filesystem is checked to 2

sudo tune2fs -c 2 {{/dev/sdXN}}

Set the filesystem label to `MY_LABEL`

sudo tune2fs -L 'MY_LABEL' {{/dev/sdXN}}

Enable discard and user-specified extended attributes for a filesystem

sudo tune2fs -o discard,user_xattr {{/dev/sdXN}}

Enable journaling for a filesystem

sudo tune2fs -o has_journal {{/dev/sdXN}}

Assign a new randomly-generated UUID to a filesystem

sudo tune2fs -U random {{/dev/sdXN}}

Context

tldr-pages: linux/tune2fs

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