Hi Vivek,
I am a doctor by profession and took to programming as a hobby. For a structured and planned introduction and study of computer science I have joined MCA offered by IGNOU (I had Maths in XII). Linux is in the syllabus for II sem. Though it was taught very well at my study centre (Karrox), I needed more material. I surfed and came across your tutorial. It is excellent. I just went through few pages and many commands and concepts were understood.
Thanks a lot and my heartfelt gratitude for your hard work,
Regards,
Rajesh.