man > fsadm(8)

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📝 NAME

fsadm — utility to resize or check filesystem on a device

🚀 Quick Reference

Use Case	Command	Description
🔍 Check filesystem	fsadm check /dev/sda1	Check filesystem on device
📏 Resize filesystem to full device	fsadm resize /dev/sda1	Resize to fill entire device
📏 Resize to specific size	fsadm resize /dev/sda1 100G	Resize to 100 GiB
🔒 Resize with dm-crypt	fsadm -c resize /dev/mapper/cryptdev 50G	Resize filesystem and crypt mapping
🧪 Dry-run resize	fsadm -n resize /dev/sda1	Print commands without executing
💪 Force resize	fsadm -f resize /dev/sda1	Bypass sanity checks
🔇 Unmount ext* before resize	fsadm -e -y resize /dev/vg/test 1000M	Unmount and auto-answer yes

📖 SYNOPSIS

fsadm [options] check device
fsadm [options] resize device [new_size]

📚 DESCRIPTION

fsadm utility checks or resizes the filesystem on a device. It tries to use the same API for ext2, ext3, ext4, ReiserFS and XFS filesystem.

⚙️ OPTIONS

📌 -e|--ext-offline

🔌 Unmount ext2/ext3/ext4 filesystem before doing resize.

📌 -f|--force

💪 Bypass some sanity checks.

📌 -h|--help

❓ Display the help text.

📌 -n|--dry-run

🧪 Print commands without running them.

📌 -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.

🚪 Exit Codes

• ✅ 0 — Successful completion
• ❌ 1 — Other failures
• ⏹️ 2 — Operation interrupted by user
• 🚫 3 — Requested check operation could not be performed because the filesystem is mounted and does not support an online fsck(8).

🧪 EXAMPLES

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

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

🌍 ENVIRONMENT VARIABLES

📌 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.

📚 SEE ALSO

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)

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📝 NAME 🚀 Quick Reference 📖 SYNOPSIS 📚 DESCRIPTION ⚙️ OPTIONS 🚪 Exit Codes 🧪 EXAMPLES 🌍 ENVIRONMENT VARIABLES 📚 SEE ALSO