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