duf

duf is a disk usage inspection CLI that reports mounted filesystem capacity, free space, usage percentages, and optional inode stats. It is essentially a more scriptable and readable df replacement for checking storage state on the current machine.

• Inspect local, network, fuse, special, loop, or bind mounts and see size, free space, usage, filesystem type, and mount point.
• Filter to specific filesystems or mount points, then sort or trim columns to focus on the disks relevant to an incident, preflight check, or host audit.
• Export mount inventory and capacity data as JSON for follow-up parsing, alerts, or automated environment diagnostics.

• --json, predictable flags, and straightforward stderr or exit-code behavior make it easy to wrap in scripts when an agent needs storage state from the current host.
• The scope is inspect-only and host-local, so it helps answer "what is full?" but does not manage partitions, volumes, or cloud disks.
• Best used inside larger shell workflows for system checks, low-space debugging, and validation before running disk-heavy tasks.

• Default output is a human-oriented colored table, so automation should prefer --json or explicit --output selections.
• It only reports mounts visible on the machine where it runs; remediation or remote storage actions still need other CLIs.