Tutorials with Creative Demos
Some special posts.
If wondering which SSL certificate has lower price, you should take a glance at moving HTTP to free HTTPS in this article. HTTPS using SSL certificates transfer sensitive data in safe way. Unfortunately, most website founders who are not aware of free approaches spend money upon this topic. Here we introduce Let’s Encrypt, which an … Read more
This article leads you on the road to Linux security involving topics of SSH and MySQL. First, you could only hide ports, and create alias not easily guessed. Gradually, if theats still exist, you may add more methods, or even the strict IP whitelisting solution. At the first place, we explain cause of dangers in … Read more
We present a way to achieve: (1) http browser clients can trigger a remote script to run, (2) Windows browsers auto refresh status for remote system on Linux. Obviously, that give us an alternative view about what common HTML layout can do. All codes here are not complicated, so you can easily understand even though … Read more
A global counter example introduced here applys Shared Memory to store a common counter value for Linux processes, which tend to get incremental amounts randomly. Moreover, we assume HTTP requests require this counter, and then focus on the behavior of child processes forked by Apache daemon. As experimental proof, the simulation model in another Linux … Read more
An alternative way to treat HTTP requests is introduced. It passes a request to a Queue, but get result from another Queue. At opposite ends of two Queues, a running daemon process get token from a global counter file, and then return it into Queue. Before that, for clarification, basic knowledge about Apache MPMs will … Read more
Yii 1.1 is one of famous PHP MVC (Model-View-Controller) frameworks. Although Yii 2.x had launched with big change in structure, Yii 1.1 will still be worth attention as some existing systems are running under it by now. With its Gii component, WebApp developing staff can create Model class with ease, and therefore leverage CRUD operations … Read more