Disk Usage Skill

Use this skill to analyze disk space and filesystem usage on Linux systems.

Quick Start

Run the included script for a disk usage overview:

./scripts/diskinfo.sh

Manual Commands

Filesystem Overview

• df -h

• Disk space usage for all mounted filesystems (human-readable)

• df -i

• Inode usage (number of files)

• lsblk

• Block device tree (disks, partitions)

• mount

• Currently mounted filesystems

Directory Size Analysis

• du -sh /path

• Total size of a directory

• du -h --max-depth=1 /path

• Size of immediate subdirectories

• du -ah /path | sort -rh | head -20

• Largest files/directories

Finding Large Files

• find /path -type f -size +100M

• Files larger than 100MB

• find /path -type f -size +1G

• Files larger than 1GB

• ls -lhS /path | head -20

• List files sorted by size (largest first)

Disk Information

• cat /proc/partitions

• Partition table

• cat /proc/mounts

• Mount information

• stat -f /path

• Filesystem statistics

Tips

• Always use -h for human-readable sizes

• The du command can be slow on large directories

• Use --max-depth=1 to limit recursion depth

• Root filesystem (/ ) usage above 90% may cause issues