Purchase a VPS in CentOS. SSH to your VPS. Download and deploy Shadowsocks into your VPS. wget –no-check-certificate https://raw.githubusercontent.com/teddysun/shadowsocks_install/master/shadowsocksR.sh chmod +x shadowsocksR.sh ./shadowsocksR.sh 2>&1 | tee shadowsocksR.log Follow the promotions and set basic informaiton. If meet errors, install C compilor: yum -y install gcc automake autoconf libtool make yum -y install gcc-c++ some commands start：/etc/init.d/shadowsocks …
How to fix “Caused by: java.lang.NoClassDefFoundErr”
Use code below to compile and run our program: javac -d . Caller.java java com.Caller
How to install JavaFX on Mac
The simplest way I have seen is to use brew: brew tap bell-sw/liberica brew install –cask liberica-jdk15-full Then we could use terminal at least to run our JavaFX program. However, I think here would be more setting steps if you wanna run it in some IDE.
Java Development Configuration in VS Code MacOS
Got jdk path /usr/libexec/java_home -V Set JAVA.HOME VSCode -> Code -> Preference -> setting -> enter java.home -> setting.json
How to deploy Halo in CentOS VPS
Install Nginx in VPS Install Java sudo yum install java-11-openjdk -y // install java java -version // check version Create a new halo user useradd -m halo // new user usermod -aG wheel halo // grant permission passwd halo // set password su – halo // switch user Download halo.jar mkdir ~/app && cd ~/app …
How to deploy Nginx in CentOS
SSH to VPS ssh root@ip Update yum to install Nginx yum -y update Install Nginx yum install nginx Start Nginx and start Nginx when server launch systemctl start nginx systemctl enable nginx Check Nginx status systemctl status nginx Set firewall for visiting sudo firewall-cmd –permanent –zone=public –add-service=http sudo firewall-cmd –permanent –zone=public –add-service=https sudo firewall-cmd –reload …
Solve “Error Establishing Database Connection” on WordPress
Connect to server console. In my case, I just log in digitalocean and click console from my droplet. Check mysql status: sudo netstat -plt If we can’t see mysql appear in output from previous step, restart mysql manually: sudo systemctl start mysql Problem should be fixed if you are lucky 🙂
How to build VPN with Vultr and OpenVpn
Sign up and log in Vultr. Build a personal server. Pick Openvpn as server type from application. Save the openvpn username and password. Download OpenVpn application from Internet. Fill in IP address, username & password.
Spring – AOP
Aspect Oriented Programming with Spring Aspect-oriented Programming (AOP) complements Object-oriented Programming (OOP) by providing another way of thinking about program structure. The key unit of modularity in OOP is the class, whereas in AOP the unit of modularity is the aspect. Aspects enable the modularization of concerns (such as transaction management) that cut across multiple …
Spring – IoC
Introduction This Blog covers the Spring Framework implementation of the Inversion of Control (IoC) principle. From Spring official document, IoC is also known as dependency injection (DI). It is a process whereby objects define their dependencies (that is, the other objects they work with) only through constructor arguments, arguments to a factory method, or properties …