Solar Hydel Hybrid Power Stations
We hear a lot of fuzz about solar-wind hybrid power plants. Its surprising why there’s no major projects which utilize solar energy to multiply the output from ...
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.
BoshServlet Updated
BoshServlet is updated at Google code (http://code.google.com/p/bosh-servlet/) with the following changes – Intermittent race condition and lock ups while servi...
Remove virus “myFolder.exe”
I could fix the usb-disks infected with the virus which replaces your folders with a file folderName.exe, by following these steps (on Windows) – Run the comman...
javax.net.ssl.SSLHandshakeException: unable to find valid certification path to requested target
Error: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuil...
Implementing a custom query executor / custom data source in Jasper server
This is small article on how to implement a custom datasource or a custom query executor in Jasper Reports Server, focused on the missing information in other t...
Skip Authorization on MySQL DB
To skip authorizations and login without password to MySql server, sudo vi /etc/mysql/my.cnf Add the line skip-grant-tables after the linewhich reads skip-exter...
Chat/Text messaging from commandline on Linux
Want to urgently copy a text message from one pc to another, or have a short conversation with a peer on another pc ? here’s how – @ PC1: nc -l [port-number to ...
How to find the latest queries run in MySQL
Run the following queries – SET GLOBAL log_output = 'TABLE'; SET GLOBAL general_log = 'ON'; After the latest 100 queries executed after this is done can be foun...
Activate password authentication on Ubuntu VMs on Amazon EC2
ssh -i [path to private-key-file] [target IP] # In the host shell sudo adduser [username] # Add a new user; this command also prompts for setting the passwo...
Extract .gz file using gzip without deleting the original file
Extract the .gz file to standard output (option -c) and pipe this to target file. # example <pre><code>gzip -c inputfile.gz > outputfile</code...