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= INVESTIGATION 1: MONITORING HARD DISK SPACE =
=== Part 1: Viewing Free Monitor Available Hard Disk Space & Disk Usage ===
[[Image:disk_usage.png|thumb|500px|right|The '''df''' and '''du''' commands are useful tools for Linux system administrators to flag disk space issues and investigate their causes.]]
Another essential duty of a Linux system administrator is to anticipate problems and take preventative measures to avoid computer system problems <u>before</u> that occur.
===Part 2: Use Using crontab to Schedule Running of Shell SriptsFlag Low Hard Disk Space===
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