Month: November 2025

Control Dependence Graph and Data Dependence Graph

  • Haco
  • November 22, 2025
  • 3 min read

A Control Dependence Graph (CDG) and a Data Dependence Graph (DDG) are essential tools in computer science, particularly in compiler design and program analysis. They represent the dependencies between different parts of a program's code, but they focus on two distinct types of relationships. Control Dependence Graph (CDG) A Control Dependence Graph illustrates how the execution of a statement is controlled by a conditional branching statement. In simpler terms, a statement is control-dependent on a conditional if the outcome of that conditional determines whether the statement will be executed. Nodes in a CDG represent the…

WordPress site Migration from CentOS7 to Ubuntu24

  • Haco
  • November 22, 2025
  • 4 min read

Phase 1: Preparation on CentOS 7 (Source Server) First, you need to back up your data. Log in to your CentOS server via SSH. 1、Backup the DatabaseRun this command to export your database to a SQL file.(Replace db_name, db_user with your actual database details) mysqldump -u db_user -p db_name > wordpress_backup.sql 2、Backup WordPress FilesCompress your website files into a single archive to make the transfer easier.(Assuming your site is at /var/www/html or /usr/share/nginx/html) tar -czf wordpress_files.tar.gz /var/www/html Phase 2: Setup Ubuntu 24.04 (Destination Server) Log in to your new Ubuntu 24.04 server. You need…

How to reset ZeroTier moon node

  • Haco
  • November 22, 2025
  • 4 min read

ZeroTier Installation ZeroTier provides a script that detects your OS, adds the correct GPG keys and repositories, and installs the package for you. # Install curl (if missing): sudo apt update && sudo apt install curl -y # Run the install script: curl -s https://install.zerotier.com | sudo bash # Check Status: sudo zerotier-cli status # Enable on Boot: sudo systemctl enable zerotier-one Deorbit obsolete Moon Node To check if your client is connected to a Moon node and to remove it ("de-orbit"), follow these steps. sudo zerotier-cli listpeers…