Linux Command: Tee

“The tee command is normally used to split the output of a program so that it can be both displayed and saved in a file.” wikipedia

tee file.txt

This command create a file.txt and anything you type is : displayed on the screen AND written to the file.

ctrl + z or ctrl + c 

Use this command above to end the session

tee -a file.txt

Same thing as the previous command, except this time it is using the -a (append) flag.

“Note: When tee is used with a pipe, the output of the previous command is written to a temporary file. When that command finishes, tee reads the temporary file, displays the output, and writes it to the file(s) given as command-line argument.” wikipedia

echo "We are YCSoftware" | tee -a file.txt 

The output of the echo command to be written to the file file.txt AND also displayed it on the screen

Reference
https://en.wikipedia.org/wiki/Tee_(command)

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