tune2fs

Adjust ext filesystem parameters

high risk

interactive breakdown — edit the command and press Explain

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⚠ Risks & cautions

Enabling/disabling features on mounted filesystems can corrupt data.

What it does

Tune ext2/3/4 parameters; -l lists them.

Common flags

Flag	Meaning
`-l`	List superblock
`-m`	Reserved percentage
`-O`	Features
`-L`	Label

Examples

tune2fs -l /dev/sda1Show parameters · explain & risk-check →

tune2fs -m 1 /dev/sdb1Reserve 1% · explain & risk-check →

Related

Open the full explainer →More in Disks & Filesystems

Reference text is hand-written and may be incomplete — check man tune2fs for your version. Test destructive commands on a non-production system first.