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DISK USAGE
Scenario
Monitoring alerts: root partition at 89% capacity on hexworth-db. Find the disk hogs before the database server runs out of space and crashes.
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Solution Cheat Sheet
Task 1 — Filesystem disk usage
df -h
Task 2 — Directory disk usage
du -sh /var
Task 3 — Subdirectory sizes
du -h --max-depth=1 /var
Task 4 — List block devices
lsblk
Task 5 — Inode usage
df -i
Task 6 — Top 5 largest files
du -ah /var/log | sort -rh | head -5
