Disk Space Analysis and Cleanup

# Show disk usage summary
df -h                 # Human readable
df -i                 # Inode usage

# Check specific directory size
du -sh /path          # Summary total
du -sh *              # Each item in current dir
du -h --max-depth=1   # One level deep

# Find large files (>100MB)
find / -type f -size +100M 2>/dev/null
find . -type f -size +50M -exec ls -lh {} \;

# Sort by size
du -sh * | sort -rh
ls -lhS               # Sort files by size

# Find largest directories
du -ah /path | sort -rh | head -20

# Clean package cache (Ubuntu/Debian)
sudo apt clean
sudo apt autoclean
sudo apt autoremove

# Clean package cache (CentOS/RHEL/Fedora)
sudo yum clean all
sudo dnf clean all

# Remove old logs
sudo journalctl --vacuum-time=7d  # Keep last 7 days
sudo rm -rf /var/log/*.gz

# Find and delete core dump files
find / -name "core.*" -type f -size +10M -delete

# Remove old Docker data
docker system prune -a

# Check for deleted files still held
lsof | grep deleted

# NPM cleanup
npm cache clean --force

# Analyze with ncdu (interactive)
ncdu /path            # Install ncdu first