Practice

In certain scenarios, we may need to set up a chained VPN structure: first connecting internal devices to a self-hosted WireGuard server (e.g., a personal VPS), then routing all traffic through that server to another VPN (a corporate, school, or commercial VPN service) before reaching the internet. Building this “VPN over VPN” network architecture offers the following clear advantages: Robust Privacy Protection: Internal devices’ data flows are first encrypted through a self-hosted WireGuard tunnel to your personal VPS. Then, the VPS forwards it again through a corporate or commercial VPN before finally exiting to the internet via that VPN’s IP address. This method completely avoids using the VPS’s own IP address to access target networks, greatly reducing the risk of your personal IP being tracked or leaked. ...

Portainer is a good control panel for Docker containers. Its code repository is here. It supports single node and cluster deployments. Prior to this, I had completely containerized my personal server. If you can visualize the operation and monitoring of various containers, it helps a lot in daily operation and maintenance, and you feel that everything is under control. You can see the effect after building, the interface is still very beautiful. ...

This alert usually occurs when you choose the “no prepayment” reserved instance program. The reason for this is that you don’t have enough credit, in other words, your monthly expenses are too low. In this case, it’s best to choose a partial or full prepayment plan, so you can pass. Moreover, the partial prepayment and full prepayment programs will be more cost-effective. You can save a lot of money if you buy for a long number of years. ...

Actual time written: 2017-05-20 20:57:23 Have to admit that last year was a low year, whether in life, study, or spirit. Seeing and the goal is getting farther and farther away, and they are powerless to change. But now it’s different. After getting through all the difficulties, I finally found a new way of thinking and discovered myself for the first time. After solving a series of problems, my internal worries have dissolved, and I feel that I can finally concentrate all my abilities without being limited by myself. ...

If you have installed Ubuntu and Windows and then reinstalled Windows. Then the Grub boot entry will most likely be overwritten by Windows Boot Manager and you won’t be able to enter Ubuntu at that time. But don’t panic, follow the steps below to fix grub2 boot without installing additional software. Creating a USB boot disk for Ubuntu In order to repair the boot entries, we need to use the software tools provided with the Ubuntu system. Although we can’t get into the original Ubuntu system for now, we can use the image written on the Ubuntu USB stick to get a working basic Ubuntu environment. Download the image file from the Ubuntu website. ...

Installing electron and chromedriver with yarn in China is often a problem that cannot be connected. At this time, we may prefer to use a mirror repository in China to speed up the process, rather than setting up a proxy. And when installing electron, it is useless to set yarn’s global proxy alone. So how do you set up proxies based on different packages? You can follow the sample commands provided in the list below to set it up. ...

oh my zsh is a very good configuration framework based on zsh, it can simplify a lot of daily operations of Linux end users. Moreover, its interface is very nice compared to the original bash. This article describes how to install and configure oh my zsh and its common plugins under Ubuntu. oh my zsh Installation and Basic Configuration Before installing oh my zsh, you need to install git, curl and zsh by running the following commands. ...

I have been using some mature configuration files to help me configure and beautify the vim editor, however, the original spf13-vim.sh I was using has not been updated for a long time, and some of the plugins in its plugin list can no longer be downloaded properly. So I was looking for a replacement for it, and I found space-vim-dark to be quite good. space-vim-dark basic introduction After my search, I found a better and more beautiful configuration file space-vim-dark. this space-vim-dark is probably a vim configuration file written by Chinese, it can make vim adapt to the dark mode very well. First, I’ll post the repository address: https://github.com/liuchengxu/space-vim-dark This is the effect of its picture, the overall look is still good. ...

As I need to solve a three-dimensional packing problem in mathematical modeling, I have selected the paper “Hybrid Simulated Annealing Algorithm for Solving Three-Dimensional Packing Problems” published by Prof. Zhang Defu et al. in the Journal of Computing as the theoretical basis of the problem after searching. The abstract of the paper is as follows: A hybrid simulated annealing algorithm for efficiently solving the Three Dimensional Container Loading Problem 3D-CLP is proposed . The Three Dimensional Container Loading Problem (3D-CLP) requires loading a subset of a given set of boxes into a container such that the total volume of the loaded boxes is maximized. The hybrid simulated annealing algorithm presented in this paper is based on three important algorithms: (1) the composite block generation algorithm, which differs from the traditional algorithms in that the composite block proposed in this paper does not contain only a single type of crates, but can contain any type of crates under certain constraints. (2) Basic heuristic algorithm, which is based on block loading and can generate a placement scheme according to a specified loading sequence. (3) Simulated annealing algorithm, based on composite block generation and basic heuristic algorithm, encodes the loading sequence as a feasible placement scheme, and searches the encoding space using simulated annealing algorithm to find the approximate optimal solution of the problem. The algorithm is tested using 1,500 weakly and strongly heterogeneous data for the packing problem. Experimental results show that the fill rate of the hybrid simulated annealing algorithm exceeds that of the best known algorithms. ...

When installing the zsh plugin zsh-autosuggestions or zsh-syntax-highlighting, we generally encounter the problem of oh-my-zsh plugin ‘xxx’ not found. Now, we analyze and solve the oh-my-zsh plugin ‘zsh-autosuggestions’ not found and plugin ‘zsh-syntax-highlighting’ not found problems. The reason for the problem is that the code repository of the plug-in has not been cloned to the local location, so the plug-in you want is not actually installed. Solving the problem is very simple, just simply enter the following command: ...