title: Use variables with dot in unix shell script
body: <p>How do I use variables with dot in a Unix (Bash) shell script? I have the script below:</p>
  
  <pre><code>#!/bin/bash
  set -x
  "FILE=system.properties"
  FILE=$1
  echo $1
  if [ -f "$FILE" ];
  then
     echo "File $FILE exists"
  else
     echo "File $FILE does not exist"
  fi
  </code></pre>
  
  <p>This is basically what I need ⟶ <code>x=propertyfile</code>, and <code>propertyfile=$1.</code> Can someone please help me?</p>