How to redirect stdout and stderr separately?

QuestionsQuestions8 SkillsProData Stream RedirectionOct, 01 2025
0122

To redirect standard output (stdout) and standard error (stderr) separately in Bash, you can use the following syntax:

Example:

command > output.txt 2> error.txt

Breakdown:

  • command: The command you want to run.
  • > output.txt: Redirects stdout to output.txt.
  • 2> error.txt: Redirects stderr to error.txt. The 2 refers to the file descriptor for stderr.

Combined Example:

If you want to run a command and redirect stdout to one file and stderr to another, you can do it like this:

./my_script.sh > stdout.txt 2> stderr.txt

In this example:

  • Any normal output from my_script.sh will go to stdout.txt.
  • Any error messages will go to stderr.txt.

This way, you can handle the outputs separately for better debugging and logging.

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