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...
Category: technology
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...
IP Telephony – bit rates of audio formats, and other notes
The bit rates for the most common audio formats – ALAW 8 BITS ULAW 8 BITS PCM 16 BITS SIGNED/UNSIGNED ADPCM 8 BITS The endian-ness for more than one byte system...
Fix : Docker node down after restartIP Telephony – bit rates of audio formats, and other notes
The bit rates for the most common audio formats – ALAW 8 BITS ULAW 8 BITS PCM 16 BITS SIGNED/UNSIGNED ADPCM 8 BITS The endian-ness for more than one byte system...
Fix: Cannot start container Subnet sandbox join failed error from docker
Error : Few docker containers don’t start up. In the /var/log/syslog they give the error “Cannot start container Subnet sandbox join failed…” Fix: Restart the m...