Aimer's Blog

ZFS Pool and Dataset Basics

Sun, 26 Jul 2026 00:00:00 +0800

Create a ZFS pool on Ubuntu and manage datasets, properties, quotas, encryption, snapshots, and replication.

Fix Linux EFI

Sun, 22 Dec 2024 22:44:57 +0800

When you have many disks, and you install many operating system, you may faced with a problem. That is your system’s EFI file will be stored in a different disk rather than your root disk. Also, you may accidentally delete system’s EFI file in a different disk. Here is how you can fix it.

Warning

Setup Your Own Apt Mirror

Sat, 14 Dec 2024 23:08:17 +0800

What you need

a server running ubuntu
enough disk space (at least 600G)
good internet connection
a domain name (optional)
a ssl certificate (optional)

Prepare your server

You can buy a cloud server, or use a local machine. Here, I am using a local machine to setup a offline apt mirror which can speed up my workflow.

Install `apt-mirror`

Just run the following command to install apt-mirror on your server:

How to Setup Your Fabric Workspace

Sun, 17 Mar 2024 21:16:38 +0800

Prepare JDK and IDE

Just simply download IntellJ IDEA Community is good for fabric development.

Keep in mind that you must download jdk-17 for development. You can download the jdk inside IDEA or download it manually. But don’t forget to setup in IDEA.

Download Template

You can download a template in fabric template mod generator.

Setup your own Mod Name, Mod ID and Package Name. Select the newest minecraft version and download the zip file.

Boot Fedora From Windows Hyper-V

Fri, 08 Mar 2024 00:15:56 +0800

Enable Hypyer-V
disk manager -> offline
create vm. skip the disk creation
open vm settings. select physical disk instead of vhd
Disable secure boot and checkpoint

https://superuser.com/questions/1284201/hyper-v-boot-to-os-on-physical-disk

Install Syncthing on Ubuntu Server

Fri, 14 Jul 2023 16:40:36 +0800

Install Syncthing

Debian/Ubuntu installation instructions

Import PGP keys

# Add the release PGP keys:
sudo curl -o /usr/share/keyrings/syncthing-archive-keyring.gpg https://syncthing.net/release-key.gpg

Add APT source

# Add the "stable" channel to your APT sources:
echo "deb [signed-by=/usr/share/keyrings/syncthing-archive-keyring.gpg] https://apt.syncthing.net/ syncthing stable" | sudo tee /etc/apt/sources.list.d/syncthing.list

Install Syncthing

# Update and install syncthing:
sudo apt-get update
sudo apt-get install syncthing

Install systemd unit

Download service file

wget https://github.com/syncthing/syncthing/blob/main/etc/linux-systemd/system/syncthing%40.service

Install service file

sudo chown root:root syncthing@.service
sudo mv syncthing@.service /etc/systemd/system/
sudo systemctl daemon-reload

Enable service

Install Google Play Store at One Plus Ace2

Wed, 15 Mar 2023 14:20:08 +0800

Today, I buy a new phone One Plus ACE 2. It’s a good phone and it contains GMS which can be enabled from settings. But it did not give you a google play store, which I really need to install some paid apps. So here is how you can install one.

Enable GMS From Settings

Open your settings app, search google.
Click the first result Google Mobile Services.
Enable Google Mobile Services.
Login in your google account at Google if you want.

Install Google Play Store

After you enable GMS, all you need to do next is install a google play store.

Install qBittorrent-nox Inside Docker

Tue, 14 Mar 2023 20:27:07 +0800

Install docker

You need to install docker first before get started.

Take fedora as an example, just simply run these command:

# First, remove old docker packages
sudo dnf remove docker \
 docker-client \
 docker-client-latest \
 docker-common \
 docker-latest \
 docker-latest-logrotate \
 docker-logrotate \
 docker-selinux \
 docker-engine-selinux \
 docker-engine

# Install latest docker via dnf package manager
# Set up the repository
sudo dnf -y install dnf-plugins-core
sudo dnf config-manager \
 --add-repo \
 https://download.docker.com/linux/fedora/docker-ce.repo
# Install Docker Engine
sudo dnf install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

# Start Using Docker
# Start Docker
sudo systemctl start docker
# Start Docker As System Boot
sudo systemctl enable docker
# Test If Docker Works
sudo docker run hello-world

View Docs for more detail about how to install docker in ubuntu system.

Docker Basic Notes

Mon, 13 Mar 2023 20:31:37 +0800

This post is just a simple note.

More detail in this video: https://www.youtube.com/watch?v=3c-iBn73dDE

Difference Image and Container

CONTAINER is a running environment for IMAGE
- virtual file system
- port blinded: talk to application running inside of container
- application image: postgres, redis, mongo, …
redis in dockerhub are images

docker pull postgres
docker pull redis

# lists installed images
docker images

docker run redis
# `-d` means running in detached mode
docker run -d redis

# lists running container
docker ps
# lists running and stopped container
docker ps -a

# stops the container
docker stop <CONTAINER ID>
# start the container
docker start <CONTAINER ID>

# pulls image and starts container
docker run redis:4.0

CONTAINER Ports vs HOST ports

Multiple containers can run on your host machine
Your laptop has only certain ports available
Conflict when same port on host machine

host	docker
Port 5000	Port 5000
Port 3000	Port 3000
Port 3001	Port 3000

docker run -p6000:6379 redis

docker logs <CONTAINER ID>

docker logs <CONTAINER NAMES>

docker run -d -p6000:6379 --name redis-older redis:4.0

# it Interactive Terminal
docker exec -it <CONTAINER ID> /bin/bash
docker exec -it <CONTAINER NAMES> /bin/bash
# if no bash installed
docker exec -it <CONTAINER ID> /bin/sh
docker exec -it <CONTAINER NAMES> /bin/sh

# create a new container from a image
docker run
# start a exist container
docker start

docker pull mongo
docker pull mongo-express

docker network ls

docker network create <NETWORK NAME>

docker run -d \
 -p 27017:27017 \
 -e MONGO_INITDB_ROOT_USERNAME=admin \
 -e MONGO_INITDB_ROOT_PASSWORD=password \
 --network mongo-network \
 --name mongodb \
 mongo

docker run -d \
 -p 8081:8081 \
 -e ME_CONFIG_MONGODB_ADMINUSERNAME=admin \
 -e ME_CONFIG_MONGODB_ADMINPASSWORD=password \
 -e ME_CONFIG_MONGODB_PORT=27017 \
 -e ME_CONFIG_MONGODB_SERVER=mongodb \
 --net mongo-network \
 --name mongo-express \
 mongo-express

docker logs <CONTAINER ID> -f
docker logs <CONTAINER ID> | tail
docker logs <CONTAINER ID> | more

Docker Compose

docker run command

Add Friend Link in PaperMod Blog

Sun, 12 Mar 2023 13:25:06 +0800

PaperMod is a good hugo blog theme, but it did not support a friend link officially. So you need to do some simple customize.

Full Code

Put this shortcode into layouts/shortcodes/friends.html

<style type="text/css">
 .friends {
 --link-count-per-row: 1;
 }

 @media screen and (min-width: 576px) {
 .friends {
 --link-count-per-row: 2;
 }
 }

 @media screen and (min-width: 768px) {
 .friends {
 --link-count-per-row: 3;
 }
 }

 .friends {
 display: grid;
 grid-template-columns: repeat(var(--link-count-per-row), 1fr);
 grid-gap: 16px;
 }

 /* 空间占位 */
 .friend-skeleton {
 height: 280px;
 display: inline-block;
 position: relative;
 }

 .friend {
 height: 100%;
 width: 100%;
 position: absolute;
 top: 0;
 left: 0;
 transition: 0.67s cubic-bezier(0.19, 1, 0.22, 1);
 border-radius: var(--radius);
 box-shadow: 0 3px 1px -2px rgba(0, 0, 0, 0.2),
 0 2px 2px 0 rgba(0, 0, 0, 0.14), 0 1px 5px 0 rgba(0, 0, 0, 0.12) !important;
 overflow: hidden;
 display: flex;
 flex-direction: column;
 justify-content: flex-start;
 align-items: center;
 }

 .friend:hover {
 transform: translateY(-8px);
 box-shadow: 0 3px 5px -1px rgba(0, 0, 0, 0.2),
 0 5px 8px 0 rgba(0, 0, 0, 0.14), 0 1px 14px 0 rgba(0, 0, 0, 0.12) !important;
 }

 .friend-avatar {
 object-fit: cover;
 width: 100%;
 height: 180px;
 margin: 0 !important;
 border-radius: 0 !important;
 }
 .friend-content {
 text-align: center;
 flex: 1;
 width: 100%;
 padding: 16px;
 background: var(--entry);
 transform: translate3d(0, 0, 0);
 }

 .friend-name {
 font-size: 1.2rem;
 font-weight: bold;
 transform: inherit;
 }

 .friend-description {
 font-size: 0.8rem;
 color: var(--secondary);
 transform: translate3d(0, 0, 0);
 }
</style>
<div class="friends">
 {{ range .Site.Data.friends }}
 <div class="friend-skeleton">
 <a href="{{ .link }}" target="_blank">
 <div class="friend">
 <img class="friend-avatar" src="{{ .image }}" />
 <div class="friend-content">
 <div class="friend-name">{{ .title }}</div>
 <div class="friend-description">{{ .intro }}</div>
 </div>
 </div>
 </a>
 </div>
 {{ end }}
</div>
<!-- style code by https://github.com/fissssssh -->
<!-- view https://github.com/fissssssh/fissssssh.github.io for more detail -->

Usage

Add your friends in data/friends.yml like this:

- title: "伞"
 intro: "一只咸鱼的学习记录"
 link: "https://umb.ink/"
 image: "https://avatars.githubusercontent.com/u/53655863?v=4"
- title: "HelloWorld的小博客"
 intro: "这里是一个小白的博客"
 link: "https://mzdluo123.github.io/"
 image: "https://avatars.githubusercontent.com/u/23146087?v=4"

Use shortcodes like this in your post:

Set Custom Fonts in PaperMod Site

Thu, 02 Mar 2023 20:54:06 +0800

Download fonts

Download the fonts you need and put it into static/fonts

Import your fonts

@font-face {
 font-family: "LXGWWenKai-Regular";
 src: url("/fonts/lxgw-wenkai/LXGWWenKai-Regular.ttf") format("truetype");
}

Apply it in css

body {
 font-family: LXGWWenKai-Regular;
}

Use in PaperMod

Put your own css file in assets/css/extended/custom_fonts.css

Import multi-weight fontfamily

@font-face {
 font-family: "LXGWWenKai";
 src: url("/fonts/lxgw-wenkai/LXGWWenKai-Light.ttf") format("truetype");
 font-weight: lighter;
 font-style: normal;
}

@font-face {
 font-family: "LXGWWenKai";
 src: url("/fonts/lxgw-wenkai/LXGWWenKai-Regular.ttf") format("truetype");
 font-weight: normal;
 font-style: normal;
}

@font-face {
 font-family: "LXGWWenKai";
 src: url("/fonts/lxgw-wenkai/LXGWWenKai-Bold.ttf") format("truetype");
 font-weight: bold;
 font-style: normal;
}

Use cdn

@import url('https://cdn.jsdelivr.net/npm/jetbrains-mono@1.0.6/css/jetbrains-mono.min.css');

code {
 font-family: 'JetBrains Mono';
}

Spotify Short Codes

Wed, 01 Mar 2023 20:57:21 +0800

Today, I accidentally found a good music from Spotify. I want to share it on my blog, so I try this awesome code. Bellow are the what it look like:

Full code from j-un:

Download this html file or copy the code, put it in layouts/shortcodes/spotify.html. Enjoy it!

How to Add Multiple Tags to Go Struct

Sun, 26 Feb 2023 12:48:36 +0800

It is easy but always be forgotten, so write this post

Incorrect

type Page struct {
 PageId string `bson:"pageId",json:"pageId"`
 Meta map[string]interface{} `bson:"meta",json:"pageId"`
}

Correct

type Page struct {
 PageId string `bson:"pageId" json:"pageId"`
 Meta map[string]interface{} `bson:"meta" json:"pageId"`
}

More tags

Items []Item `gorm:"column:items,type:varchar(255);comment:'sample column'" json:"items"`

Install kvm on Fedora

Sat, 25 Feb 2023 15:36:58 +0800

KVM: Kernel-Based Virtual Machine

Products	Company
VirtualBox	Oracle
VMWare	VMWare
Hyper-V	Microsoft

First, use x86 laptop or pc.

# check if kvm avaiable (output should bigger than 0)
egrep -c '(vmx|svm)' /proc/cpuinfo

if output is 0, enable vt on BIOS.

Install KVM on fedora36

# Install required virtualization packages
sudo dnf -y install bridge-utils libvirt virt-install qemu-kvm

# Also install useful tools for virtual machine management
sudo dnf -y install libvirt-devel virt-top libguestfs-tools guestfs-tools

qemu-kvm: the emulator itself
libvirt-daemon: runs virtualization in background
birdge-utils: important networking dependencies
virt-manager: the graphical program we’ll use to work with our VMs

sudo usermod -aG libvirt aimer
sudo usermod -aG kvm aimer

sudo systemctl start libvirtd
sudo systemctl enable libvirtd

Virtual Machine Manager (or “virt-manager”)

Install rEFInd on Fedora

Sun, 20 Nov 2022 20:10:58 +0800

rEFInd on Fedora

Install

Obtain an rEFInd binary for RPM based system.

direct link (not the newest)

Find the newest rpm package download link from here.

After you download a rpm package, install it with your package manager

sudo dnf install refind-0.6.11-1.x86_64.rpm
sudo rpm -Uvh refind-0.6.11-1.x86_64.rpm
sudo yum localinstall refind-0.6.11-1.x86_64.rpm

At the most of the time, your are ready to use rEFInd, if it did not work on your system, run refind-install:

OneDrive on Linux

Sun, 20 Nov 2022 20:10:48 +0800

OneDrive on Linux

Install

sudo dnf install onedrive

[user@hostname ~]$ onedrive

Authorize this app visiting:

https://.....

Enter the response uri:

Copy the url from browser like this:

https://login.microsoftonline.com/common/oauth2/nativeclient?code=<redacted>

Paste it into terminal then press enter:

The Final result will like this:

[user@hostname ~]$ onedrive
Authorize this app visiting:

https://login.microsoftonline.com/common/oauth2/v2.0/authorize?client_id=22c49a0d-d21c-4792-aed1-8f163c982546&scope=Files.ReadWrite%20Files.ReadWrite.all%20Sites.ReadWrite.All%20offline_access&response_type=code&redirect_uri=https://login.microsoftonline.com/common/oauth2/nativeclient

Enter the response uri: https://login.microsoftonline.com/common/oauth2/nativeclient?code=<redacted>

Application has been successfully authorized, however no additional command switches were provided.

Please use 'onedrive --help' for further assistance in regards to running this application.

Configuration

Show your configuration:

Install and Configure Samba

Sun, 20 Nov 2022 17:55:43 +0800

Update System

sudo apt update

Install Samba

sudo apt install samba

sudo vim /etc/samba/smb.conf

Add share point at the end of the config file

[share-name]
comment = Your Comment Here
path = /path/to/share/dir
read only = no
browsable = yes
[public]
comment = Public Shared Disk
path = /mnt/disk/smb/share
read only = no
browsable = yes
create mask = 0644
directory mask = 0755
[private]
comment = Pricate Data Share
path = /mnt/disk/smb/private
read only = no
browsable = no
valid user = aimer, umb
create mask = 0644
directory mask = 0755
[media]
comment = Media Files
path = /media
read only = yes
browsable = yes

Start Samba

sudo systemctl start smbd.service

Enable Autostart

sudo systemctl enable smbd.service

Update Firewall Rules

sudo ufw allow samba

Setting User Password

sudo smbpasswd -a username

Warning

Install Filebrowser on Ubuntu Server

Fri, 18 Nov 2022 16:37:27 +0800

Install Filebrowser

Install file browser to your server:

curl -fsSL https://raw.githubusercontent.com/filebrowser/get/master/get.sh | bash

Have a quick test:

filebrowser -a 0.0.0.0 -r /path/to/your/files

Access your server and try to login in.

Username: admin
Password: admin

Create Your Own Config

Write your config file:

sudo mkdir /etc/filebrowser/
sudo vim /etc/filebrowser/.filebrowser.yaml

Write something like this:

port: 8080
address: 0.0.0.0
root: /path/to/your/file
database: /etc/filebrowser/filebrowser.db

Create Service

Write a service file:

sudo vim /etc/systemd/system/filebrowser.service

Write something like this:

[Unit]
Description=File Browser Service
After=network.target

[Service]
Type=simple
Restart=on-failure
RestartSec=5s
ExecStart=filebrowser

[Install]
WantedBy=multi-user.target

Start and enable it:

Install qBittorrent-nox on Ubuntu Server

Fri, 11 Nov 2022 15:34:47 +0800

Install qBittorrent-nox on Ubuntu Server

Update ubuntu

sudo apt update && sudo apt upgrade -y

Import qBittorrent-nox Stable

sudo add-apt-repository ppa:qbittorrent-team/qbittorrent-stable -y

Import qBittorrent-nox Unstable (Nightly)

sudo add-apt-repository ppa:qbittorrent-team/qbittorrent-unstable -y

Reflect the newly added PPA

sudo apt update

Install qBittorrent-nox

sudo apt install qbittorrent-nox -y

Create usergroup

sudo adduser --system --group qbittorrent-nox

# on fedora
sudo groupadd qbittorrent-nox

Add you to usergroup

sudo adduser your-username qbittorrent-nox

# on fedora
sudo usermod -aG qbittorrent-nox your-username

Create a systemd service file

sudo vim /etc/systemd/system/qbittorrent-nox.service

[Unit]
Description=qBittorrent Command Line Client
After=network.target

[Service]
Type=forking
User=qbittorrent-nox
Group=qbittorrent-nox
UMask=022
ExecStart=/usr/bin/qbittorrent-nox -d --webui-port=8080
Restart=on-failure

[Install]
WantedBy=multi-user.target

Reload systemctl

sudo systemctl daemon-reload

Start qBittorrent-nox

sudo systemctl start qbittorrent-nox

Enable qBittorrent-nox

sudo systemctl enable qbittorrent-nox

Check if qBittorrent-nox start

systemctl status qbittorrent-nox

Item	Value
username	admin
password	adminadmin

How to Remove qBittorrent-nox

# Remove qBittorrent Stable
sudo add-apt-repository --remove ppa:qbittorrent-team/qbittorrent-stable
# Remove qBittorrent Unstable (Nightly)
sudo add-apt-repository --remove ppa:qbittorrent-team/qbittorrent-unstable -y
# Remove qBittorrent
sudo apt autoremove qbittorrent-nox

Install WeChat on Fedora

Thu, 10 Nov 2022 12:03:30 +0800

Install WeChat on Fedora

Install Wine

sudo dnf install wine

Adjust DPI Config

Use bellow command to open winecfg

winecfg

Adjust the dpi to a suitable value at tab Graphics. (4k monitor, 192 dpi)

Download And Config Fonts

Run the following commands

sudo dnf install cabextract

sudo dnf install winetricks

winetricks corefonts gdiplus riched20 riched30

Download & Install WeChat

Just download the exe Installer. (Same with download it from browser.)

[Reproduce] Learning Rust in 2022

Wed, 29 Jun 2022 07:58:02 +0800

This article are reproduce from pretzelhammer/rust-blog

Intro

When I started learning Rust I made the mistake of following the advice to read The Book first. While it’s a great resource, it’s pretty overwhelming for a beginner to get told “If you’d like to learn this programming language the best way to start is to read this 20 chapter book!” Most people give up before they even get started when they get advice like this. Nobody ever told someone to read a 20 chapter book just to get started with Javascript or Python. Rust’s learning curve is no joke but you gotta give the people what they want, and they want to program, not read about programming. Programming is fun and reading about programming is not as fun.

Install WSA With Google Play Store and Root

Tue, 17 May 2022 23:13:13 +0800

Install

Uninstall old wsa (if you have)
make sure you have Virtual Machine Platform enabled on Turn Windows features on or off
fork this repo: https://github.com/LSPosed/MagiskOnWSA
build it with actions
download build result
run the install script
start the wsa and enjoy it

Enable usb debug

Open wsa settings, enable Developer Mode
copy wsa ip address
adb connect WSA-IP-ADDRESS

How to Setup Your New Linux Server

Tue, 17 May 2022 22:09:41 +0800

Update System

# Debian
apt update
# Fedora
dnf update

Install Most Used Tools

# Debain
apt install -y neofetch htop tree ncdu ranger zsh vim neovim git curl wget net-tools
# Fedora
dnf install -y neofetch htop tree ncdu ranger zsh vim neovim git curl wget util-linux-user

Create Sudo User

# Debian
adduser aimer
usermod -aG sudo aimer
# Fedora
useradd -G wheel aimer
passwd aimer

Test Root Privileges

su - aimer
sudo cat /etc/shadow

Setup SSH Public Key

Quickly Upload Your Local Key

# run this on your local machine
ssh-copy-id aimer@server

Import The Key You Hosted

# Import your own public key!
wget https://aimer.aiursoft.cn/authorized_keys -O ~/.ssh/authorized_keys
chmod 600 ~/.ssh/authorized_keys

Test if You Can Connect to Server

ssh aimer@server

sudo vim /etc/ssh/sshd_config

Set PermitRootLogin as no To disable root login
Set PasswordAuthentication as no To disable password login

Delete this file /etc/ssh/sshd_config.d/50-cloud-init.conf

Enable Swagger on Spring Boot Gradle Projects

Thu, 30 Dec 2021 15:35:21 +0800

Adding Swagger to Spring Boot

Getting the Swagger Spring dependency
Enabling Swagger in your code
Configuring Swagger
Adding details as annotations to APIs

Getting the Swagger Spring dependency

Edit build.gradle

plugins {
id 'org.springframework.boot' version '2.5.2'
...
}
...
dependencies {
implementation "io.springfox:springfox-boot-starter:3.0.0"
...
}

Enabling Swagger in your code

Add @EnableSwagger2 to SpringBootApplication

Configuring Swagger

Create SwaggerConfig class.

package com.aimerneige.example.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

@Configuration
@EnableSwagger2
public class SwaggerConfig {

 @Bean
 public Docket apiDocket() {
 return new Docket(DocumentationType.SWAGGER_2)
 .apiInfo(apiInfo())
 .select()
 .apis(RequestHandlerSelectors.basePackage("com.aimerneige.example.controller"))
 .paths(PathSelectors.any())
 .build();
 }

 private ApiInfo apiInfo() {
 return new ApiInfoBuilder()
 .title("Example API")
 .version("1.0")
 .build();
 }
}

Adding details as annotations to APIs

Add annotation to your controller.

Auto Start Wifi Hotspot on Gnome

Sun, 07 Nov 2021 20:54:42 +0800

Edit and save file nmcli-hotspot.desktop on path /home/aimerneige/.config/autostart

[Desktop Entry]
Name=nmcli-hotspot
Comment=Open HotSport With nmcli
Exec=nmcli connection up Hotspot
Terminal=true
Type=Application

Vala Env Setup

Sat, 23 Oct 2021 21:36:57 +0800

vala env setup

When it’s talking to Linux development, there are many ways to go. But I love elementary and want to build some awesome apps with vala. So this article is about how to set up your vala develop environment on elementary os. In the future, there will more articles about vala and Linux development.

System Info

When I write this artice (2021-7-31), elementary os 6 is still in develop, so I install it in gnome boxes. My host machine syetem is fedora 34.

Hello Hugo

Tue, 17 Aug 2021 07:16:04 +0800

Install and Config hugo

Dark Mode on Android

Sat, 05 Sep 2020 17:43:46 +0800

In this example, I am using Material Design. But you can also use the Theme.AppCompat.DayNight.

This is a simple way to adapt a dark mode, if you wants more, check for GitHub or Internet.

Change the style

First you should use the DayNight style by Google.

<style name="AppTheme" parent="Theme.MaterialComponents.DayNight">

If you want to let things easily, that’s enough. But you can also provide more adaptation.

Adapt colors

Make a new folder at project/app/src/main/res/values-night then make a new resource file colors.xml. Edit the color you want to set on dark mode.

MinGW Install For Windows

Wed, 19 Aug 2020 15:51:09 +0800

Click here to download the MinGW setup file.

Run the mingw-get-setup.exe.

Click Install.

Click Continue.

Waite for install.

After install done, click Continue.

Select what you wants to install and right click it, click Mark For Installation.

Click Installation on the left top.

Click Apply Changes.

Click Apply.

Just wait for install. (May need proxy)

After that, the mingw has been installed successfully. You can uninstall this install program.

Set the system env settings and enjoy it!

Android Develop Data Save

Tue, 18 Aug 2020 00:50:53 +0800

Change Package Name Quickly

Sometimes, we may need to change the package name of our Android Project. Maybe the package is not suitable or we get a better package name. But that’s doesn’t matter, we just need to change it. So, how we can change a package name? Here are the solution.

Open your Android Project at Android Studio.
Go to the Androidmanifest.xml.
Find your package name. For example com.aimerneige.test.example.
Click the part you want to change, like test.
Right click and select Refactor -> Rename.
Select the Rename package.
Enter a new package name.
Click the Refactor, Do Refactor.
Waiting for the operation done.

That’s all. Enjoy it!

Android Develop Data Save

Mon, 10 Aug 2020 00:50:41 +0800

Save data to file

save data

// This function will save the data of inputText into file "data" as text file
// The file "data" will be saved to /data/data/com.aimerneige.example/files/data
fun save(inputText: String) {
 try {
 // "data" is the name of the file you saved on phone storage
 // You can change it as you want
 val output = openFileOutput("data", Context.MODE_PRIVATE)
 val writer = BufferedWriter(OutputStreamWriter(output))
 writer.use {
 it.write(inputText)
 }
 } catch (e: IOException) {
 e.printStackTrace()
 }
}

load data

// This function will try to load the data at a file named "data"
// which is on /data/data/com.aimerneige.example/files/data
fun load(): String {
 // a StringBuilder to load data
 val content = StringBuilder()
 try {
 // "data" is the name of the file you want to find on disk
 val input = openFileInput("data")
 val reader = BufferedReader(InputStreamReader(input))
 reader.use {
 reader.forEachLine {
 content.append(it)
 }
 }
 }
 catch (e: IOException) {
 e.printStackTrace()
 }
 return content.toString()
}

You can also use like this:

How to install ffmpeg on Windows 10

Mon, 10 Aug 2020 00:01:10 +0800

Go this link and download a build package.

For the version, choose the newest release version number like 4.3.1.

For the Architecture, choose the Windows 64 bit.

For the Linking, choose the Static.

For the License, it’s doesn’t matter if you just use it on local.

After selected, just click Download Build. You will get a zip package.

Unzip the package to any location you want. I recommend to the C:\ffmpeg

Enable USB for VirtualBox on Ubuntu

Sun, 26 Jul 2020 07:58:20 +0800

Different from Windows, if you wants to use usb enabled to VirtualBox, you must edit a config file, which is needn’t on Windows.

I can’t remember it and search for web many times because when you set it, you need’t to edit it twice. But sometimes, I will reinstall my ubuntu and the config will lost, so I wants to save it on my Blog in case one day I will use it.

Hello World

Fri, 24 Jan 2020 15:50:47 +0800

Welcome

Welcome!

HelloWorld

This is a simple test for my first blog article.

Mathjax

Test 1

$$a_{PI}(x|D) = E[u(x) | x, D] = \int_{-\infty}^{f’} \mathcal{N}(f; \mu(x), \kappa(x, x)) \ df =\phi(f’; \mu(x), \kappa(x, x))$$

Test 2

$$\frac{e}{\left( e+e^{\pi} - \pi^{e}\right) ,\left( - e+\pi^{e}\right) }+{E(\left( e+\pi\right) ,\left( 2,e+\pi\right) )}^{e}$$

C

#include <stdio.h>
int main()
{
 printf("HelloWorld!\n");
 return 0;
}

C++

#include <iostream>
int main()
{
 std::cout << "HelloWorld!" << std::endl;
 return 0;
}

Java

public class Main {
 public static void main(String[] args) {
 System.out.println("HelloWorld!");
 }
}

Python

print("HelloWorld!")

Go

package main

import "fmt"

func main() {
 fmt.Println("HelloWorld!")
}

Hidden Text

Mermaid

sequenceDiagram Alice->>John: Hello John, how are you? John-->>Alice: Great! Alice-)John: See you later!

Gallery

Yalong Bay No.2, Longhai Road No., Jinyang, Sanya, Hainan China

About Me 👨‍💻

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about

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