Chan Chen Coding...

     摘要: FTP works on a client/server model. The server component is called an FTP daemon. It continuously listens for FTP requests from remote clients. When a request is received, it manages the login and sets up the connection. For the duration of the session it executes any of commands sent by the FTP client.  閱讀全文

     摘要: SSH stands for “secure shell”, and it is a network protocol that allows you to securely send commands to a remote machine. The “secure” part comes from the fact that the connection is encrypted, which means that an attacker cannot eavesdrop on the connection, or intercept and replace your commands with his own midway through transit. SSH is pretty reliable and secure, and is commonly used in the Linux world. Administrators often use it to remotely manage machines – it’s usually more comfortable   閱讀全文

     摘要: LAMP stack is a group of open source software used to get web servers up and running. The acronym stands for Linux, Apache, MySQL, and PHP. Since the virtual private server is already running Ubuntu, the linux part is taken care of. Here is how to install the rest.  閱讀全文

     摘要: When developing a https application, your test server often doesn't have a (valid) SSL certificate. This will cause the following exception to be thrown when connecting your client to the test server: "javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated".  閱讀全文

     摘要: 1. Create a new certificates file.
2. Configure SSL  閱讀全文

     摘要: Java 操縱對象都是通過引用來實現的，所有的對象變量都是所指向的對象的引用，那也就是說所有對象變量的值并不是它所指向的對象本身，而是該對象的引用，這句話聽起來可能有點讓人犯暈，舉個例子來說，String str = new String("aaa"); 這條語句的意思是 new 了一個值為 "aaa" 的字符串對象，然后用一個名字叫 str 的對象變量來指向它，保存它的引用  閱讀全文