Beginner LevelLinux Commands & SysAdmin
How do df and du check disk space usage and directory sizes?
❓ Interview Prompt: Explain df -h (filesystem disk usage) vs du -sh (directory disk usage) and identifying large files.
Checking disk storage utilizes two complementary CLI tools:
1. 'df -h' (Disk Free):
Reports total, used, and available disk space across all mounted filesystems in human-readable format (GB/MB).
2. 'du -sh *' (Disk Usage):
Calculates accumulated disk space consumed by specific files or directories.
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'-s': Summary for directory.
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'-h': Human-readable units.
Code Implementation Example
bash
# Check free space across all mounted filesystems
df -h
# Find top 10 largest subdirectories in /var
du -sh /var/* | sort -rh | head -n 10💡Inspecting filesystem space with df -h and top directory usage with du -sh.
🎯 Interview Key Takeaway
Use df -h to check overall filesystem capacity, and du -sh to locate large folders consuming disk space.
#df#du#Disk Usage#Storage#Beginner
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