Remove all existing keys Generate ssh key for the current user which wants to commit to github add the ssh key for new user Initialise… Read More »How to push as different user in github

Requirement: Update log4j2.properties on all elastic search servers, restart them and check if logs are being rolled and purged over or not. Use Case 1:… Read More »Hands on with ansible: Elastic Search

Sometimes, we have seen in logs same exception occurs continuously and you get full stacktrace of that exception. But after some time, you just get… Read More »Exception stack trace suppressed after same exception many times + Java

We create threads in application to improve performance. So, how many maximum threads can we create?? You might wondering we can create threads as much… Read More »Maximum Number Of Threads (Linux/MacOS) + OutOfMemory unable to create new native thread

Spent few hours to upgrade the version of `style.css` for a wordpress theme Finally got following, Assume you want to bump up the version of… Read More »Update version of style.css for wordpress theme

Recently encountered a use case in production where three distributed docker container were doing the same task where only one was supposed to do that.… Read More »Leader Election in Zookeeper

Many times while doing an initial commit we accidentally adds `.classpath`, `.project` or other unwanted files. but later on some point of time we want… Read More »Removing a file from git without removing it from local

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