Bash Scripting - Error Handling
You want to run a script and log all output and errors to separate files, but also display errors on the terminal immediately. Which command achieves this?
You want to run a script and log all output and errors to separate files, but also display errors on the terminal immediately. Which command achieves this?
hard📝 Best Practice Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand process substitution
Using '2> >(tee error.log >&2)' sends stderr to tee, which writes to error.log and stderr.Step 2: Confirm output and error separation
Stdout goes to output.log, stderr both saved and displayed on terminal.Final Answer:
script.sh > output.log 2> >(tee error.log >&2) -> Option CQuick Check:
Process substitution duplicates stderr to file and terminal [OK]
Quick Trick: Use process substitution to tee stderr to file and terminal [OK]
Common Mistakes:
MISTAKES- Redirecting stderr only to file without display
- Merging stdout and stderr incorrectly
- Using &> which merges outputs
Master "Error Handling" in Bash Scripting
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