How to Fix: How do I write standard error to a file while using "tee" with a pipe?

To write standard error to a file while usingtee with a pipe, you can use the following command:

🔍 How to Do It

• Use tee with the -a option, which appends output to the file instead of overwriting it:./aaa.sh | tee -a bbb.out 2>&1
• Alternatively, use tee and pipe both standard error (2>&1) and standard output (1>&1) to the same file:./aaa.sh | tee bbb.out 1>&1 2>&1
• Or, use a combination of tee, |, and cat to achieve the same result:./aaa.sh | tee ccc.out; cat ccc.out

🛠️ Step-by-Step Verified Fixes

🎯 Final Words

By following these methods, you can write standard error to a file while using tee with a pipe.