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  Configure static IP for Linux

When a Linux server is running, it has to have an IP so that other machines can talk to it. It is often desired that the server would own a static IP so that every time other machines want to connect to it, the same IP address would be used. This is extremely useful when there are virtual machines installed on a host machine where the virtual machine would start and stop now and then.  To configure static IP address for a Linux server, the /etc/network/interfaces needs to be updated. Assumi...

   LINUX,NETWORK,STATIC IP,DNS     2017-07-08 08:39:58

  GoLang to build smaller executable file

Normally the executable file built with go is a bit large, it is always desired that a smaller executable file should be generated though. In this post, a couple of ways to reduce the size of the executable will be introduced. The end effect is that the executable file size would be much less than the normal generated one. The file which is built normally has below size. Mode LastWriteTime Length Name ---- ------------- ------ ---- -a---- 12/14...

   GOLANG,EXECUTABLE     2019-12-13 20:10:45

  WireGuard VPN: Setup WG_VPN client App on Android phone and connect to local WG_VPN server on VM

We will show the detail steps about how to setup the WireGuard VPN client on an Android phone/pad and configure the VPN client to connect a WG_VPN server in local network. The setup process contents three main steps: Install WireGuard and create a key-pair in WireGuard client. Add the Android client peer information in the WireGuard server’s config file. Config the Android WireGuard client to connect to the server. The test environment network configuration:  Step 1. Install Wire...

   WIREGUARD,VPN,TUTORIAL     2020-10-24 08:46:42

  Use CSS calc to align an element vertically

calc function is a function introduced in CSS3, it can be used to calculate length values. There are a few good features which make it suitable for aligning an element vertically. One good part is that the operands can have different units like percentage, px, rem etc. This makes it very flexible when calculating the length value. One example: .rect{ margin-top:20px; height:50px; background:green; width:calc(100%-20px); } Here the left operand uses percentage while the right one ...

   CSS3,CALC,VERTICAL ALIGN     2019-08-23 20:30:23

  Android create button tutorial

This tutorial assumes that you already have an activity and are using an XML layout. Open the layout XML and add the button element.  Assign an ID with the “@+id” operator.  The + tells Android to generate an ID for this element so that you can reference it in your Java files. This is an example. Your layout and text elements will probably be very different. In this example case, the ID of the button is “close”. <Button android:id="@+id/close" android:lay...

   Android,Simulator,Button,XML,Tutorial     2014-11-07 08:30:10

  Write HTML easily with Emmet and Haml

Writing HTML codes is very boring and tedious as it has many tags and it's static. One solution is to use template, filling content based on other's skeleton. One another solution is high speed writing. We can write HTML codes with Emmet and Haml. These two ways have similar functions but with different characteristics. Haml is based on Ruby, so when working on Ruby/Rails projects, we recommend to use Haml, otherwise we recommend to use Emmet. 1. Emmet Emmet is a editor plugin, the official webs...

   HTML,Emmet,Haml     2013-06-11 19:46:02

  Redis Cluster and Common Partition Techniques in Distributed Cache

In this post, I will discuss a few common partition techniques in distributed cache. Especially, I will elaborate on my understanding on the use of Redis Cluster. Please understand that at the time of writing, the latest version of Redis is 4.0.10. Many articles on the same topic have a different idea from this post. This is mainly because, those articles are probably outdated. In particular, they may refer to the Redis Cluster implementation in Redis 3. Redis Cluster has been improved...

   REDIS,DISTRIBUTED CACHE,CLOUD COMPUTING     2019-01-17 08:10:37

  Code to Create Custom Share Buttons

Interested in sharing your B2B content on Facebook, Twitter, LinkedIn or delicious? Do multi-option social media sharing tools such as ShareThis seem like overkill?That was our conclusion after researching the social media sites on which readers are most likely to share content from our blog focused on solutions to a wide range of business challenges, What Works for Business. We decided that Facebook, LinkedIn, delicious, and Twitter were the sites on which our target busines...

   Share button,Web content,Facebook,Custom     2011-08-24 10:40:29

  Understanding database, instance and schema in Oracle database

Oracle database is the most popular database system among enterprises. To start working on Oracle database, some concepts must be understood first. They include database, instance, schema and user etc. And among these concepts, some have different meanings from those in other database systems such as MS SQL, MySQL, DB2. On the web, there are already some good posts which explain different concepts such as Ask Tom's database vs instances, Difference between database vs user vs schema. In this pos...

   DIFFERENCE,DATABASE,ORACLE DATABASE,INSTANCE,SCHEMA,USER     2016-12-14 23:30:56

  10 Reasons Why Visual Basic is Better Than C#

Visual Basic is a better programming language than Visual C#. Who says so? This article! Here are 10 reasons why you should always choose VB over C#. 1 – “Rose is a rose is a rose is a rose” This is a quotation from Gertrude Stein’s 1922 play Geography and Plays. However, the poetry wouldn’t work in C#, because – unforgivably – it’s a cASe-SeNSitIvE language. This is madness! Before I start ranting, let me just acknowledge that case-sens...

   Visual basci,C#,Advantage,Comparison     2012-03-10 04:24:03

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