This script allows to debug android with adb commands in terminal easily, with one or many devices/emulators: See blog at https://dev.to/mckabue/connect-debug-android-with-adb-android-debug-bridge-commands-in-terminal-easily-with-one-or-many-devices-emulators-1g1o

debug-android-from-terminal.sh

#!/bin/bash

devices=(`adb devices | grep -v devices | grep device | cut -f 1`)
devicesCount=${#devices[@]}
devicesToUse=()

if [ $devicesCount -eq 0 ] 
then
    echo "No attached devices.";
elif [ $devicesCount -eq 1 ] 
then
    name=`adb -s ${devices[0]} shell getprop ro.product.model`
    api=`adb -s ${devices[0]} shell getprop ro.build.version.sdk`
    version=`adb -s ${devices[0]} shell getprop ro.build.version.release`

    echo "One attached device.";
    
    read -p "Use \"$name [$version - API $api]\"?[yes/no] (default: yes): " useDevice
    useDevice=${useDevice,,}
    if [ "$useDevice" = "yes" ] || [ -z "$useDevice" ]
    then
        devicesToUse=(${devices[0]})
    fi
else
    echo "$devicesCount attached devices."
    defaultDeviceName=`adb -s ${devices[0]} shell getprop ro.product.model`
    defaultDeviceApi=`adb -s ${devices[0]} shell getprop ro.build.version.sdk`
    defaultDeviceVersion=`adb -s ${devices[0]} shell getprop ro.build.version.release`
    echo "Which device do you want to use? (default: \"$defaultDeviceName [$defaultDeviceVersion - API $defaultDeviceApi]\")"

    for i in ${!devices[@]}; 
    do
        device=${devices[$i]}
        name=`adb -s $device shell getprop ro.product.model`
        api=`adb -s $device shell getprop ro.build.version.sdk`
        version=`adb -s $device shell getprop ro.build.version.release`
        echo "$(($i+1)))    $name [$version - API $api]"
    done
    echo "$(($devicesCount+1)))    all"
    
    read -p "Choose a number: " deviceIndex

    deviceIndex=$((${deviceIndex,,}-1))

    if [ $deviceIndex -gt 0 ] && [ $deviceIndex -lt $devicesCount ];
    then
        devicesToUse=(${devices[$deviceIndex]})
    elif [ $deviceIndex -eq $devicesCount ]
    then
        devicesToUse=("${devices[@]}")
    else
        devicesToUse=(${devices[0]})
    fi
fi

devicesToUseCount=${#devicesToUse[@]}
if [ $devicesToUseCount -gt 0 ]
then
    for i in ${!devicesToUse[@]}; 
    do
        device=${devicesToUse[$i]}
        name=`adb -s $device shell getprop ro.product.model`
        api=`adb -s $device shell getprop ro.build.version.sdk`
        version=`adb -s $device shell getprop ro.build.version.release`
        echo "Using \"$name [$version - API $api]\""
        adb -s $device "$@"
    done  
fi