title: How to fix the terminal "source" command on OSX Catalina
body: <p>I try executing the below commands in my terminal.</p>
  
  <p><code>$ source ~/.bash_profile</code> or <code>. ~/.bash_profile</code></p>
  
  <p>and the system returns:</p>
  
  <p><code>-bash: [[-s: command not found</code></p>
  
  <p>I cannot think of anything extra information to provide.</p>