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Accepted
Ahmed Hussein
Asked: 2020-07-31 19:46:46 +0800 CST

How to get both the output of the time command in a file?

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I ran the command time echo "Hello world" | tee output.txt expecting to get the full output to both terminal stdout and the output.txt file. However, the file content is not what I expect :

Expected file content:

Hello world

real 0m0.000s
user 0m0.000s
sys 0m0.000s

Actual content:

Hello world"

can anyone help ?

redirect tee

1 Answers

  1. Best Answer

    time Writes the time statistics to stderr. So we need to redirect stderr stream into stdout, then redirect it's output to tee.

    (time echo "Hello world") 2>&1 | tee output.txt

    Here

    • we need to take (time echo) as a single command so used braces,
    • redirected stderr to stdout,
    • piped stdout to tee.
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