combine output from two commands in bash

Question

Is it possible to combine output from these two commands?

node ~/projects/trunk/index.js 
python ~/projects/trunk/run.py run

Neither command exits so I'm not sure how to do this.

Answer 1

You can combine two commands by grouping it with { } :

{ command1 & command2; }

so far, you can redirect the group to a file :

{ command1 & command2; } > new_file

if you want to separate STDOUT and STDERRin two files :

{ command1 & command2; } > STDOUT_file 2> STDERR_file

Answer 2

Try this:

paste $(node ~/projects/trunk/index.js) $(python ~/projects/trunk/run.py run) > outputfile

Answer 3

I ended up doing this, the other suggestions did not work, as the 2nd command was either killed or never executed.

alias app () {
    nohup python ~/projects/trunk/run.py run 1>/tmp/log 2>&1 &
    echo $! > /tmp/api.pid
    nohup node ~/projects/trunk/index.js 1>/tmp/log 2>&1 &
    echo $! > /tmp/client.pid
    tail -f /tmp/log
}