#!/bin/bash
same=0
sSet=$(set | grep -E "^\w+=")
sEnv=$(env | grep -E "^\w+=")

echo "set: $(wc -l <<<$sSet) variablen"
echo "env: $(wc -l <<<$sEnv) variablen"

for v in $sEnv; do
  if echo "$sSet" | grep -q "$v"; then
    ((same++))
  fi
done
echo "$same variables in both set and env"