[tee] How to display message on the console and output to the file

[tee] How to display message on the console and output to the file

1. input some message to /dev/ttyUSB0

echo "show" > /dev/ttyUSB0

2. cat the message from /dev/ttyUSB0 and output file to /home/happy/tftp/test12345

cat -v <  /dev/ttyUSB0  |  tee /home/happy/tftp/test12345

Reference :

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