Migrate data from one Cassandra server to another using medusa
Here are the steps I followed to get my dev instance of cassandra copied to a new server (both single node instances) I’ve used medusa tool for the same. You ca...
Author: Sreekumar Kj
Sreekumar (KJ) has been a hobby programmer from school days. Codemarvels is his personal blog from the year 2010, where he writes about technology, philosophy, society and a bit about physics.
He now runs a conversational AI company - DheeYantra - focusing his efforts to help businesses improve operational efficiency using digital employees powered by AI.
Blocked when SSH’in due to startup error? SSH without running .bashrc
In case a faulty script started by .bashrc or .profile is failing and crashing SSH initiation, you could still login and fix the issue by running shell directly...
A JS assistant to remind us to exercise during WFH days
Here is a weekend hack I wrote to remind me to get up from my workstation and do some lightweight exercises during the WFH days – Fit@WFH Some of the featu...
Flush DNS cache in Ubuntu 20.xx and above
On bash, run – sudo systemd-resolve --flush-caches Should be done. Sreekumar KjSreekumar (KJ) has been a hobby programmer from school days. Codemarvels is his p...
Change the datacenter set in cassandra-rackdc on Ubuntu
Problem: Changing just the datacenter name in cassandra-rackdc.properties gives the error: Solution:If you are just beginning to setup you cassandra cluster, an...
RabbitMQ installation fails in in the last leg of setting up in ubuntu 20.04
Error: Setting up rabbitmq-server (3.8.16-1) … Job for rabbitmq-server.service failed because the control process exited with error code. See "systemctl status ...
An “eat dosa!” reminder for busy kids :)
Here is a one hour HTML app that you can use to repeat recorded audio to remind your busy kids they have to finish that food on the table, while watching their ...
Enable dark mode for Chrome on desktop
Here is how you can apply dark more on chrome on your desktop – That’s it. Now you can have easy on eyes theme on Chrome, just like your IDE ! Sreekumar KjSreek...
NPM install gives error : Cannot find module ‘semver’
Problem:We get this error when we do npm install – Error: Cannot find module ‘semver’Require stack: Reason:Version issues Fix:Run these commands sudo rm -rf /us...
Fix : Docker node down after restart
Problem: One of the docker nodes does not start up after restart. Error in the log is msg="error removing task " error="incompatible value" Reason: Docker swarm...