Простой скрипт сравнения строк

echo $SDB_FOUND | xxd
echo $NOT_PRESENT | xxd

List of devices attached ^M
List of devices attached
Tizen device found.

SDB_FOUND=`sdb devices | tail -2 | head -1 | cut -f 1 | sed 's/ *$//g' | col -b`

#!/bin/bash
 
check-for-tizen-device() {
 
  NOT_PRESENT="List of devices attached"
  SDB_FOUND=`sdb devices | tail -1 | col -b`
  if [[ ${SDB_FOUND} == ${NOT_PRESENT} ]]; then
    echo "Tizen device seems to be missing."
    return 1
  else
    echo "Tizen device found."
    return 0
  fi
}

check-for-tizen-device