Question

How to redirect the out of ls /tmp command to more than one file

i.e, the out put needs to be on ls /tmp > a.txt and b.txt

Answer 1

Use tee:

# This way you will see the output.
ls /tmp | tee file1.txt file2.txt

# With this line you won't.
ls /tmp | tee file1.txt file2.txt >/dev/null