title: How to sort lines based on a sub string in the line
body: <p>I have the following output:</p>
  
  <pre><code>aaa=12
  bbb=124
  cccc=1
  dddd=15
  </code></pre>
  
  <p>I want to sort the above lines based on the value.s so the output should look like this:</p>
  
  <pre><code>$ cat file | awk_or_sed_or_any_command
  cccc=1
  aaa=12
  dddd=15
  bbb=124
  </code></pre>
  
  <p><strong>UPDATE</strong></p>
  
  <p>I tried the following commands:</p>
  
  <pre><code>$ cat file | awk -F '=' '{print $2"="$1}' | sort |  awk -F '=' '{print $2"="$1}'
  </code></pre>
  
  <p>But it's too long. </p>
  
  <p>Are there another suggestion better than the above one?</p>
  
  <p>Note: my linux use sort from busybox that support only the following options:</p>
  
  <pre><code>$ sort --help
  BusyBox v1.19.4 (2014-04-04 18:50:39 CEST) multi-call binary.
  
  Usage: sort [-nru] [FILE]...
  
  Sort lines of text
  
          -n      Sort numbers
          -r      Reverse sort order
          -u      Suppress duplicate lines
  </code></pre>