Bash Scripting - Error Handling
Which signal is commonly used with
trap to run cleanup code when a script exits normally?Which signal is commonly used with trap to run cleanup code when a script exits normally?
easy🧠 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Identify signals for trap
SIGINT is for interrupt, SIGKILL and SIGSTOP cannot be trapped, EXIT is a special pseudo-signal for script exit.Step 2: Choose the signal for normal exit cleanup
EXIT runs commands when the script finishes normally or exits.Final Answer:
EXIT -> Option BQuick Check:
cleanup on exit = EXIT signal [OK]
Quick Trick: Use EXIT signal to trap script normal exit [OK]
Common Mistakes:
MISTAKES- Using SIGKILL which cannot be trapped
- Confusing SIGINT (interrupt) with normal exit
- Trying to trap SIGSTOP which is uncatchable
Master "Error Handling" in Bash Scripting
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