How to redirect output to a file and stdout

Question

In bash, calling foo would display any output from that command on the stdout.

Calling foo > output would redirect any output from that

Answer 1

Another way that works for me is,

 |& tee  

as shown in gnu bash manual

Example:

ls |& tee files.txt

If ‘|&’ is used, command1’s standard error, in addition to its standard output, is connected to command2’s standard input through the pipe; it is shorthand for 2>&1 |. This implicit redirection of the standard error to the standard output is performed after any redirections specified by the command.

For more information, refer redirection