Posts

How email system works

 A user u1 opens outlook and accesses mail host abc.com . That mail host can be a Linux system running some mail server daemon e.g. postfix. On that host, multiple users are created.  User u1 from outlook logs in as a user at abc.com . User writes a mail and send it to u5@xyz.com . The mail first goes to mail server for domain abc.com. abc.com sends it to mail server for xyz.com The user u5 can access the host for domain xyz.com and read the mail. on Mail client e.g. outlook a MUA (Mail user agent) runs, with which user writes and sends mails. MTA (Mail Transfer Agent) i.e mail server transports the messages over internet. Why we have used Agents? Each type of operation is done through some agent(program). Mail server  runs a  POP or IMAP server  to hold users' mails. POP is not real time .  IMAP is real time,  See gmail's IMAP/POP settings to get  better idea. SMTP( Simple Mail Transfer Protocol )  is used to transfer mails. Notes and ...

Daily writing 12 Nov 2021

 need to write about: what you learnt How you did something What you want to do Writer daily in evening one hour Write in a manner as you are teaching to someone all successful people write Saints, Sages, Leaders,  write story about your journey in Perf team story about you learned in perf team and profiler team story about what you learned till now in your career What are things on top of your mind: Be aware of latest Tech, how? Security, VPN? Coding, Automation, Testing tools networking - latest research papers how technology evolved and where is it going? watch yourself and analyse how you do what you do. jmeter rewriter test and how you created test plan Perf Report - Write about how you made progress Testing course by James bach, writer what you learnt Changed mindset How people make good mindmaps quickly and write scripts quickly writing good bug reports creating good test strategy and test plan ........ Performance testing - Brendan Gregg Think like a programmer - solve...

Learn to make sustainable house; possible to be built up by owner

I want to learn how to make a house by my hands; like village people used to make. materials, space, . Do I have that intuition? What do I have to unlearn ?  Do I need some space , some teacher?  Why? to learn some skill time pass some fancy imaginations, never something like this    I hope that it will be a good experience  Influenced if successful, will try to make cheap houses for people

Goal - Software Developer

Web developer HTML and CSS  by replicating static websites HTML templating Javascript  by replicating some online client side games AJAX Promises, callbacks jQuery Client side frameworks Angular React backend Learning Django from MDN Learn node express from MDN Create personal website host it on hosting servers create own web server Programming Learn C Let us C Dennis Ritchie how data is stored in memory Solve problems coderbyte.com Cracking coding interview Think like a programmer The art and craft of problem solving Practice Python, Perl How to write algorithms How to write pseudo code Operating system concepts

Can old practices be re-established?

It is my strong belief that in ancient and not more ancient(100 years ago or probably 30 years ago) times, our daily life was more active and valuable to society than today.

Practical Learning

Vinoba Bhave(A great saint and spiritual Guru of Mahatma Gandhi) has written: "We should learn while living the life. Now a days the situation has become such that people waste their most valuable time (early years of life) in school and then suddenly they are dropped in the struggle of life. Lord Krishna gave the lesson of Gita to Arjuna on the field of war, not gave lesson first in classroom and then went on war!" This tells a lot about current days' situation. We learn all subjects in school and college: Maths, Physics, Chemistry, Biology, History, Geography, English, Hindi, Sanskrit. But if think honestly, it comes to know that we do not learn any skill to live our life. Only one exam to be eligible to give another exam. Not even a simple formula from math comes in my daily use. No lesson from Physics seems to be useful in my daily life. No chemical formula is useful enough which can tell me which medicine should I take or not. Biology did not throw light upon t...

Art and Daily Work in older days

There is a sense in me which tells me that world has not evolved in greater technology and life style but it is degraded in lifestyle and technology. Now a days every body tells that now technology is much developed, we can reach to others fast, we can talk to anybody sitting in any corner of world. But Why? Why do we need to talk to persons sitting in other corner, why not sitting besides me or living besides me? Our lifestyle has become so low and unsatisfied that we are unable to entertain ourselves. We are bored very often. We have TV, Computers, Internet etc. still we are bored. So we come to conclusion that these things can not entertain us for long time. Now I want to go a little back.  I have seen my mother and grandmother in my childhood, they were never bored, always busy in something, and even then got some leisure time. My statement may look contradictory, but if we try to understand it makes sense. There was some form of art involved in every daily work of the...