In this article, we will be discussing the use cases of the tee Unix command with examples.
tee – Used in the middle of a pipeline, this command allows you to both redirect output to a file, and pass it to further commands in the pipeline.
How to use tee command
Examples: $check_patch_logs.ksh | tee check.log| more
The output of check_patch_logs.ksh is stored in the filecheck.log, and also pass it to more to display it one screen at a time.
-a option with tee command
By default, the tee command overwrites the file.
ls | tee x.txt
The above command will overwrite the file x.txt if it exists
You can instruct tee command to append to the file using the option –a
ls | tee -a x.txt
Now this will create a new file x.txt if it does not exists, if it exists, it will append to it
How to use tee to write to multiple files
We just need to specify the files name
ls | tee x.txt x1.txt x2.txt
it will store the output of ls in all these files.
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