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A script uses kill -SIGUSR1 $PID but the process does not respond. What could be the problem?

medium📝 Debug Q7 of 15
Linux CLI - Process Management
A script uses kill -SIGUSR1 $PID but the process does not respond. What could be the problem?
AThe process does not handle SIGUSR1 signal
BSIGUSR1 is not a valid signal
CThe kill command syntax is incorrect
DThe process is already terminated
Step-by-Step Solution
Solution:

  1. Step 1: Verify signal validity

    SIGUSR1 is a valid user-defined signal.

  2. Step 2: Check process signal handling

    If process ignores SIGUSR1, it won't respond.

  3. Step 3: Confirm kill syntax

    kill -SIGUSR1 $PID is correct syntax.

  4. Final Answer:

    The process does not handle SIGUSR1 signal -> Option A

  5. Quick Check:

    Process must handle signal to respond [OK]
Quick Trick: Process must handle signal to respond [OK]
Common Mistakes:
  • Assuming all signals cause termination
  • Thinking SIGUSR1 is invalid
  • Using wrong kill syntax

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