UNIX for Dummies Questions & Answers

Hi,
i know how to
a) redirect stdout and stderr to one file,
b) and write to two files concurrently with same output using tee command

Now, i want to do both the above together.

I have a script and it should write both stdout and stderr in one file and also write the same content to another file at the same time.

In other words, both files should contain all stdout and stderr and both files
should be identical, and both files should overwrite any existing files

s1.sh > log1.txt 2>&1

In the above command i want to write the exact ouput to log2.txt at the same time

How to do this?

Thanks
-srinivas yelamanchili

Code:

myscript.sh | tee outputfile1 1> outputfile2

you get two identical output files - is that what you mean?

yes jim,
but in your code the stderr is not written to either of the log files
Both the log files should have the stderr too

Thanks
srinivas

---------- Post updated at 12:39 PM ---------- Previous update was at 12:17 PM ----------

This seem to be working, however it shows output on the terminal too

s1.sh 2>&1 | tee log1.txt log2.txt

I want all output only to the log files and not any to the terminal or standard output device

Thanks
srinivas

Code:

s1.sh 2>&1 | tee log1.txt  1>  log2.txt

Thanks Jim,
this one works too:
s1.sh 2>&1 | tee log1.txt log2.txt > /dev/null

your code is much simpler and precise

However, while in both cases the logs are now good, the exit code returned at the command line is always '0' and not that of the script

If i use:
s1.sh > log1.txt 2>&1
echo $?
displays the true return code of s1.sh

Now, with the tee command it's lost. How to fix this?

Really appreciate your feedback

Unless you are using bash the pipe causes the line of code to return the status of tee.
With bash, look up PIPESTATUS examples here:
Internal Variables

Thanks jim

echo ${PIPESTATUS[0]}

shows the exit code of the first command