The topic may appear light to a DSLR/DSLT/Rangefinder/Mirrorless user. But many users are keen to learn, yet fumble with options. Everyone knows that DSLR/DSLT/Rangefinder/Mirrorless camera not cheap. But counter argument will be - is modern smartphone cheap either? Unless Tight in Budget, a Standard Camera Should Be Used For Learning & Archiving. Here is a Detailed Discussion on Smartphone … [Read more...]
How to Install SQLLine on Ubuntu (For Big Data Tools)
SQLLine is a Java console based for connecting to databases to execute SQL commands. This is a helper tutorial for other guides. Here is How to Install SQLLine on Ubuntu For Using With Big Data Tools. SQLLine depends on Java Virtual Machine, JLine console reader, JDBC driver (any JDBC compliant driver can be used). Of course we can use the same way of installation on Windows 10 Bash and Android … [Read more...]
What is Hyper-converged Infrastructure (HCI)?
It is common to find what is Hyper-converged Infrastructure (HCI) in plain English. Hyper-converged Infrastructure is software-centric architecture which is based on the processors, memory, network virtualization and other closely interrelated technologies. Standard hardware with commercial off-the-shelf (COTS) components can be used as hardware. Often, such hyperconvergent systems are offered and … [Read more...]
Android Smartphone Qualcomm DAC Sound Quality Hack : Part 1
Peculiarly, the manufacturers sell under-optimized or outdated coding resulting lower quality sound. This is an introductory article on tweaking Android acoustics. We need to hack to enable all the hardware features of Qualcomm 420 and above. Here is Part 1 of Android Smartphone Qualcomm DAC Sound Quality Hack. If you are fully newbie, you should read our few older article including SoC, Latest … [Read more...]
How to Install Chamilo on Ubuntu Server (Learning Management Software)
Chamilo is a free software for e-learning. Chamilo runs on a LAMP server and easy to install. There are several LMS (learning management system) and similar software but Chamilo is easier and popular. Here is How to Install Chamilo on Ubuntu Server. Any learning management system (LMS) provides way for administration, documentation, tracking, reporting and delivery of educational courses or … [Read more...]
Earbuds vs In-Ears/In-Canal Earphones
Earbuds are old fashioned earphones which snugly fit outer ear. Previously we compared headphones and earphones. In previous article, we clearly informed the readers that good headphones delivers the best sound. But for practical reasons, we do need to think about earbuds, in-ears/in-canal earphones. Many people are not sure about whether earbuds or in-ear earphones are right for them. Both has … [Read more...]
How To Install Apache HBase : Ubuntu Single Cloud Server Instance
Apache Hbase is column-oriented distributed datastore. Previously, we have shown installing Apache Accumulo. Accumulo is distributed key/value store, built on Hadoop. In another guide we have shown how to install Apache Cassandra. Cassandra is a column-oriented distributed datastore, inspired by BigTable. We have sown how to install Hadoop on single server instance. We can install Hbase without … [Read more...]
Arduino e-Paper/e-Ink Buying Guide
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...]
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...]