Unix: confusing use of the Tee -command

Question

Manual states that the tee is a \"pipe fitting\"-tool. The cases [1] confuse me:

1. case

echo \"foo bar\" | sudo tee -a /path/to/some/fi         


        

Answer 1

Remember that the target of tee is not restricted to regular files, but can be to devices, FIFOs, etc. Also, you can pipe to another tee invocation, and so on. :-)