title: Issue with changing login shell
body: <p>I want to change the default login shell on my Ubuntu.
  To change the shell I ran the following:</p>
  
  <pre><code>$ chsh -s /usr/bin/zsh
  </code></pre>
  
  <p>After that I restart my terminal but my default shell is still bash.</p>
  
  <pre><code>$ echo $SHELL
  /bin/bash
  </code></pre>
  
  <p>These are shells installed on my machine:</p>
  
  <pre><code>$ cat /etc/shells
  # /etc/shells: valid login shells
  /bin/sh
  /bin/dash
  /bin/bash
  /bin/rbash
  /bin/zsh
  /usr/bin/zsh
  </code></pre>
  
  <p>Record for my user in /etc/passwd is also changed like expected:</p>
  
  <pre><code>$ cat /etc/passwd|grep myuser
  myuser:x:1000:1000:myuser,,,:/home/myuser:/usr/bin/zsh
  </code></pre>
  
  <p>I successfully changed my login shell the same way on my mac but I seem to be having some issue on Ubuntu. Am I missing something here?</p>