I want to catch the STDERR and STDOUT of Background running script

Question

I have to run a script background and also i have to catch the STDERR and STDOUT . i'm using the below line .

test.sh & >> log_file 2>&1

But un fortunately nothing is getting written to log_file

Please help me here

Answer 1

Note the position of the background & character:

test.sh >> log_file 2>&1 &

Answer 2

This works

( echo stdout; echo >&2 stderr )& >> log 2>&1;
sleep 0.1; echo LOG:; cat log

and shows that both stdout and stderr get to the log.

The error must be somewhere in your test.sh.