Check filesystem integrity

Dry-run fsck check (no changes); unmount first for a live fix

fsck -n /dev/sdb1
tool
linux133 commands
tags
linuxfilesystemdebug

More linux commands

  • Create ext4 filesystem
    mkfs.ext4 -L datalabel /dev/sdb1

    Format partition as ext4 with a label

  • Resize ext4 filesystem
    resize2fs /dev/sdb1

    Grow ext4 to fill the partition (after partition resize)

  • Show filesystem info
    tune2fs -l /dev/sda1 | grep -E 'Block (count|size)|Mount count|Last mount'

    Show ext2/3/4 metadata: block size, mount count, last mount time

  • Disk usage with depth
    du -h --max-depth=2 /var | sort -rh | head -20

    Disk usage of /var up to 2 directory levels deep

  • Free disk space summary
    df -hT --type=ext4 --type=xfs --type=btrfs

    Show free space only for real filesystems (skip tmpfs/overlay)

all 133 linux commands