Bash Scripting - Error Handling
You want to run a script and save both standard output and error messages into separate files, but also keep the error messages appended (not overwritten). Which command achieves this?
You want to run a script and save both standard output and error messages into separate files, but also keep the error messages appended (not overwritten). Which command achieves this?
hard📝 Best Practice Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand output and error redirection
>overwrites standard output,2>>appends standard error to a file.Step 2: Match requirement to command
We want output overwritten in output.log and errors appended in error.log, so./script.sh > output.log 2>> error.logfits.Final Answer:
./script.sh > output.log 2>> error.log -> Option BQuick Check:
Use 2>> to append errors [OK]
Quick Trick: Use 2>> to append errors, > to overwrite output [OK]
Common Mistakes:
MISTAKES- Using 2> which overwrites error file
- Using &> which merges output and errors
- Appending output but overwriting errors
Master "Error Handling" in Bash Scripting
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