In the year 2012, we discussed about e-Paper. Basis of electronic paper is 1970s technology from Xerox Corporation. Since 1970s, people are saying "electronic paper will be future technology". e-Paper had the bad luck of being in competition with some other display at that time which is not exactly much costly than e-Paper. Here is Arduino e-Paper/e-Ink Buying Guide. e-Paper Still Costly, Offers … [Read more...]
Archives for August 2018
Safer Value of HPKP and HSTS (And Why You Should Avoid)
It is unbelievable article title as we used to promote HPKP and HSTS since they are introduced. Majority of the websites used HPKP aka Public Key pinning unfortunately faced troubles, including us (which we published as guide), well known sites such as Smashing Magazine, Scott Helme's website. Most of these websites has published their experience of such bad incidence to warn the others. HPKP … [Read more...]
How to Install or Renew SSL Cert on Ubuntu 18.04, Apache 2.4 (GeoTrust/RapidSSL/Comodo)
Although we have detailed guide on the same topic, there is necessity of an updated detailed guide for many users. Here Are the Detailed Steps & Commands on How to Install or Renew SSL Cert on Ubuntu 18.04, Apache 2.4. SSL Cert Provider Can Be GeoTrust, RapidSSL, Comodo Like CA. For this guide, we are assuming that the reader can manage own server via SSH and used with basic server management. … [Read more...]
Solve NET::ERR SSL PINNED KEY NOT IN CERT CHAIN
It is a wrong error out of caching by browser. It is not what really the site is. If the site is bad then your antivirus, antimalware will deliver warning. Our site at this moment facing NET::ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN error out of overlooked public key pinning on Google Chrome, Android etc browsers out of unmatched pin values before the expirary of our GeoTrust SSL Certificate. We do … [Read more...]
Graphing With Arduino on TFT LCD Color Display : Part I
Normally we show example of real-time reading things like DHT11 on monochrome LCD displays. We can graph that information. Graphing With Arduino on TFT LCD Color Display Probably a Needed Matter to Many Users. Graphing Can Become Difficult On Display With Less Known Drivers. Previously we have talked around MCUFRIEND TFT LCD Calculator. That one had problem with working codes. There are worse … [Read more...]
How is Cloud Computing Profitable For Website Hosting?
Cloud Computing in website hosting is mainly falls in the category of being IaaS, however some among them uses PaaS and the websites use other cloud services like DNS and CDN, which are also among the cloud. How is Cloud Computing Profitable For Website Hosting? For practical reason, we are considering only IaaS and comparing with traditional dedicated server. How is Cloud … [Read more...]
How to Install Apache Ignite on Ubuntu Server
Previously we described How Install Apache Cassandra. Apache Ignite is a distributed database, caching and processing platform. Apache Ignite utilizes RAM as it's default storage and processing tier making it included in the class of in-memory computing platforms. Data in Ignite is stored in the form of key-value pairs. The database component scales horizontally. How to Install Apache Ignite on … [Read more...]
Arduino Soil Moisture Sensor : How Works, What to Buy
Basic purpose of soil moisture sensors is determining percentage of water in soil, rater volumetric water content of soil mainly for watering plant. We commonly view certain type sensors in prototyping works on various websites and online stores. Basic questions which will come to mind to a newbie are - How Arduino Soil Moisture Sensor Works? What to Buy as Soil Moisture Sensor? We are trying to … [Read more...]
Analysis of Docker in DevOps : Part III (END)
This is the final part of Analysis of Docker in DevOps. In part I of Analysis of Docker in DevOps, we discussed the basic terms and concepts around Docker and DevOps for revision. In part II of Analysis of Docker in DevOps, we had a discussion on different types on requirements on Docker and DevOps. In this final part, we will discuss matters like Employee Onboarding, Platform independence, … [Read more...]