Tutorial Video for “PHP Function for Fetching RSS Feed and Outputting Feed...
After the post A PHP Function for Fetching RSS Feed and Outputing Feed Items as HTML was originally published, there are some updates such as adding a simple RSS feed caching mechanism and supporting...
View ArticleNotes for Beginners of Software Development on Linux
Linux is a great platform for software development targeting servers or backends. In general, working on Linux is very productive. The problem that beginners on Linux face is the the learning curve is...
View ArticleThree Methods of Executing Commands on Many Nodes in Parallel via SSH on Linux
It is common to execute commands on many nodes/hosts via SSH for managing a cluster of Linux servers. On Linux, there are many choices for this task. Generally, to run commands on many nodes, there are...
View ArticleHow to Get Bash Script’s Own Path
Bash script may need to get its own path. In normal Bash script, $0 is the path to the script. However, when a script is sourced, such as . a.sh, a.sh‘s $0 does not give a.sh while the caller’s name....
View ArticleHadoop Installation Tutorial (Hadoop 2.x)
Hadoop 2 or YARN is the new version of Hadoop. It adds the yarn resource manager in addition to the HDFS and MapReduce components. Hadoop MapReduce is a programming model and software framework for...
View ArticleHow to Disable and Enable Laptop Keyboard in Linux
Attaching a USB keyboard to a laptop is common when using a laptop because a normal keyboard may provide a more convenient typing experience. The laptop keyboard is not used in these situations....
View ArticleSpring Shell Technology For Java development
This post is about the Spring Shell technology and its use in java. Experts of java development India have shared their best knowledge in this post for Spring Shell with the community people. If you...
View ArticleVim Tutorial for Beginners: vimtutor
There are many Vim tutorials and Vim tips on the Web. However, I find the vimtutor provides the best tutorial among those so far as I found on the Web while the vimtutor seems usually reachable from a...
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Are You Wanting to Learn a Programming Language? Read Before Your Make a Choice
Making a career choice is difficult. And, if you have decided on becoming a programmer, the difficulty is just beginning. The most important thing is to first decide the language that you want to...
View ArticleBasic Knowledge of HTML and Canvas
From a small business owner, a blogger, a student or individual with a personal project, the need to create websites has never been more prominent. Having a basic understanding of HTML and canvas...
View ArticleGit through SSH Tunnel as Proxy
git is a great tool and it is common to have a git server over SSH possibly managed by gitolite. However, there are situations that we can not directly connect to the git server but be able to SSH to...
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Git Submodule Cheat Sheet
I summarize some commonly used commands that I find useful for working with git submodule. For the list of full commands, check the git submodule manual. In the following commands, I take scala-mode2...
View ArticleCheatsheet: Git Branching with a Git Server
It is common to set up git servers to host git repositories. Branching is lightweight in git and a very friendly mechanism to manage code. Here, I summarize a cheatsheet of common git branching...
View ArticleGit Merging FAQs
git merge is frequently used during development of projects managed by git. There are many common questions about git merge and I find most are solved and discussed on StackOverflow. Here, I summarize...
View ArticleKeyboard Key Mapping for Emacs: Evil Mode and Rearranging Alt, Ctrl and Win Keys
Ctrl keys are important and possibly most frequently used in Emacs. However, it is painful on today’s common PC keyboards since Ctrl keys are usually in the corner of the keyboard main area. Why the...
View ArticleA posix_spawn Example in C to Create Child Process on Linux
The posix_spawn() and posix_spawnp() functions create a new child process from the specified process image constructed from a regular executable file. It can be used to replace the relative complex...
View ArticleTurning GNOME terminal to a Pop-up Terminal
A pop-up terminal is great and handy on Linux and similar OS. On KDE, Yakuake is great. On Gnome or GTK, I ever tried Guake. It is quite good. However, it has not been as mature, stable and figure-rich...
View ArticleA PHP Function for Fetching RSS Feed and Outputing Feed Items as HTML
I aggregated all my new posts from several sites into a single RSS feed. Last time I updated my homepage, I came across an idea why not showing these feed items directly on the homepage as HTML...
View ArticleRunning a Command Upon Files or Directories Changes on Linux
Doing actions upon changes of files and directories is very useful. Examples like compiling a project after the source code files are changed, sending emails after important configuration files are...
View ArticleHow does linux kernel collect task stats data
Motivation Recently, I find it is hard to know the percentage of time that one process uses to wait for synchronous I/O (eg, read, etc). One way is to use the taskstats API provided by Linux Kernel...
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