title: Mac Terminal Command not Found
body: <p>I've been using my mac and I realized that some basic commands seem to be missing. I have tried commands including : ping, traceroute, reboot, halt<br>
  and they all show
  -bash: [SomeCommand]: Command not found</p>
  
  <p>I have installed Xcode and the CommandLineTools package as well. Can somebody help me resolve this problem?  Thank you!</p>
  
  <p>Below are some informations of my terminal:</p>
  
  <blockquote>
    <p>HenrydeMacBook-Air:~ bumpwymac$ $PATH
    -bash: /opt/local/bin:/opt/local/sbin:/Applications/XCrySDen-1.5.24-bin-semishared:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/opt/X11/bin:/usr/texbin:/Applications/XCrySDen-1.5.24-bin-semishared/scripts:/Applications/XCrySDen-1.5.24-bin-semishared/util: No such file or directory</p>
  </blockquote>
  
  <p>Thank you!</p>