Bash Scripting - Error Handling
What will be the output of this script?
ls /nonexistent_dir echo $?
What will be the output of this script?
medium📝 Command Output Q13 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the command behavior
The commandls /nonexistent_dirtries to list a folder that does not exist, so it fails.Step 2: Check exit code after failure
After failure,$?holds a non-zero exit code, 2 for ls missing directories.Final Answer:
2 -> Option AQuick Check:
Failed command exit code ≠ 0 [OK]
Quick Trick: Failed commands return non-zero exit codes like 2 [OK]
Common Mistakes:
MISTAKES- Assuming output is 0 for failure
- Confusing error message with exit code
- Expecting no output from echo
Master "Error Handling" in Bash Scripting
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