title: TK GUI looks different on different linux machines but with same version
body: <p>I have a Tk UI which when executed on different linux machine comes up with different UI. I checked tcl version is 8.6 for both platforms.
  The UI looks like this.
  invoke method : tclsh script name.tcl</p>
  <p><a href="https://i.stack.imgur.com/XZ5xA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XZ5xA.png" alt="enter image description here" /></a></p>
  <p><a href="https://i.stack.imgur.com/Wb8PZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Wb8PZ.png" alt="enter image description here" /></a></p>
  <p>I wanted to use 1st one as its more graphical and fonts are readable.
  Can you point me to check what is the difference in the tcl version installed on machine B. I assume Tk package could be different, but i dont know how to check.</p>