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What does the free command primarily display on a Linux system?

easy📝 Conceptual Q11 of 15
Linux CLI - System Administration
What does the free command primarily display on a Linux system?
ASystem uptime and load average
BDisk usage statistics
CCPU temperature
DMemory usage and availability
Step-by-Step Solution
Solution:

  1. Step 1: Understand the purpose of free

    The free command shows information about the system's memory usage, including total, used, free, and available memory.

  2. Step 2: Compare with other commands

    uptime shows system running time and load, vmstat shows detailed CPU and memory stats, but free focuses on memory.

  3. Final Answer:

    Memory usage and availability -> Option D

  4. Quick Check:

    free = Memory info [OK]
Quick Trick: Remember: free = memory info, uptime = running time [OK]
Common Mistakes:
  • Confusing free with uptime output
  • Thinking free shows CPU or disk info
  • Mixing vmstat details with free

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