Running Alexa processes inside Screen to save desktop real estate

Question

Here's the story (TL;DR is at the bottom): I've followed the tutorials in the github page and pimylifeup for setting up Alexa on a RPi3. I now have a working Alexa, started with a nice script. Great success!! However, the script opens 3 lxterminal windows and one java window. That's a lot of wasted real estate! So I thought I would use Screen to try and optimize that. I am able to have Alexa working if I execute the 3 scripts inside screen, manually. What I am having issues is with is running a script which automatically sends those commands to screen sessions (having them in a single session, and different shells will be the next step).

TL;DR: Here's what I have:

Starting the wake word detection in a bash script:

pi@pi3:~/shared/Alexa $ cat startAlexainscreen.sh
#!/bin/bash
screen -dmS "test"
#screen -S "test" -p 0 -X exec sh ~/shared/Alexa/3-WakeWord.sh
screen -S "test" -p 0 -X exec ~/alexa-avs-sample-app/sample/wakeWordAgent/src/wakeWordAgent -e sensory

checking inside screen "test" after executing the above script:

Cannot exec '/home/pi/alexa-avs-sample-app/sample/wakeWordAgent/src/wakeWordAgent': No such file or directory
pi@pi3:~/shared/Alexa $

So it seems it doesn't run the command and it's not taking into account the parameters either. I'm sure I'm missing something terribly basic.

So I tried to put the command inside a bash script:

pi@pi3:~/shared/Alexa $ cat 3-WakeWord.sh
#!/bin/bash
/home/pi/alexa-avs-sample-app/samples/wakeWordAgent/src/wakeWordAgent -e sensory
pi@pi3:~/shared/Alexa $ sh 3-WakeWord.sh
Usage: WakeWordAgent -e <engine_type>
 engine_type options:
 'kitt_ai'
 'sensory'
 'gpio'
WakeWordAgent [-h] [--help]
 prints help (this message)

Seems to run the command, but doesn't take into account the parameters. I've tried escaping the spaces, adding quotation marks, etc...

Thanks for the insights.

As a final result I expect to be able to start the 3 scripts inside a single screen session. Here are the other 2 scripts:

pi@pi3:~/shared/Alexa $ cat 1-npm.sh
#!/bin/bash
cd ~/alexa-avs-sample-app/samples/companionService
npm start

pi@pi3:~/shared/Alexa $ cat 2-JVM.sh
#!/bin/bash
cd ~/alexa-avs-sample-app/samples/javaclient
export $DISPLAY=:0.0
mvn exec:exec

Note that starting the commands in scripts 1, 2 and 3 manually inside screen, works perfectly. For some reason, calling these commands inside scripts, fails.

Answer 1

You can script some sessions in a screen with the -c option:

screen -dmS test -c screen_script

“screen_script” example contents:

screen ~/shared/Alexa/3-WakeWord.sh
screen ~/alexa-avs-sample-app/sample/wakeWordAgent/src/wakeWordAgent -e sensory
# and so on…