Sumit Das Tech Notes

How to Write an Awesome GitHub README

Posted by Sumit Das on June 2nd, 2019

Filed under: Linux, Unix, Scripts

How to Write an Awesome GitHub README I read through the earliest README I could find. Written in 1975 by William J. Earl at the CS department of UIC. The text is a little dry but also surprisingly re...

Impress your colleagues with these NPM tricks

Posted by Sumit Das on June 2nd, 2019

Filed under: Linux, Scripts

Impress your colleagues with these NPM tricks May 13 ・4 min readJust like anyone else, developers enjoy knowing some little tricks to show to their colleagues or friends. Today, I have decided to write about some of these keyboard magic that you can u...

How to create the effect of Multithreading in Linux shell scripts?

Posted by Sumit Das on September 1st, 2018

Filed under: Linux, Unix, Scripts

How to create the effect of Multithreading in Linux shell scripts? Technically speaking there is no multithreading in Linux shell script but it is possible to achieve the effect of multithreading inside Linux shell scripts. In other words,...

Port is open or closed on UNIX? - Stack Overflow

Posted by Sumit Das on March 3rd, 2018

Filed under: Linux, Aix, Unix

Try (maybe as root) lsof -i -P and grep the output for the port you are looking for. For example to check for port 80 do lsof -i -P | grep :80 Inserted from

Check bash shell script user & usage

Posted by Sumit Das on September 26th, 2015

Filed under: Linux, Aix, Unix, Scripts, Office

Check bash shell script user & usage Saturday, September 26, 20158:52 AMBash script display usage and check userSometimes it is needed to check what user is executing the bash script and whether the user supplied all required arguments:#!/bin/bash di...