访问地址：传送门

Handy Note

DB

Use navicat11 client to connect localhost mysql database and get Client does not support authentication protocol requested by server; consider upgrading MySQL client

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'newpass';

IDE

idea2018 active code

http://idea.lanyus.com/

use zsh as the default shell in vscode

1. Open User Settings and search terminal.integrated.shell.osx

2. Set it to /bin/zsh

use code command to open a project with vscode quickly in shell

1. Command+Shift+P and search shell command

2. Choose Install 'code' command in PATH

preview markdown file real time in vscode

1. Command+Shift+P and search markdown

2. Choose Open locked preview to the side

Maven

环境变量

vim ~/.bash_profile
export M2_HOME=/Users/username/Documents/maven #这里是你maven的路径
export PATH=$PATH:$M2_HOME/bin
source ~/.bash_profile

mvn -v

插件使用

• maven-install-plugin
• maven-install-plugin/examples

插件问题

• maven-plugins-can-not-be-found-in-intellij

Linux

查看Linux系统版本

lsb_release -a

lsb = Linux Standard Base

CPU使用情况

top

CPU信息

cat /proc/cpuinfo |more

查看内存

free -m

查看磁盘

df -h

fdisk -l

命令解读

which&where

• which & whereis

/usr/bin和/usr/local/bin区别

• /usr/bin & /usr/local/bin

MacOS

use zsh as the default shell

1. See the shells you already installed with the command

cat /etc/shells

2. Set zsh as the default shell

chsh -s /usr/local/bin/zsh

3. (Optional)If you want to configure zsh mannually, use

vim ~/.zshrc

4. After change .zshrc, do remember to source it to make it work

source ~/.zshrc

5. (Restore default shell)

chsh -s /bin/bash

Git

初始化git

1. 查看配置

git config --list

2. 初始化用户和邮箱

git config --global user.name "your name"
git config --global user.email your email

本地生成ssh key并放在远端以实现SSH访问

1. Generate a ssh key locally

ssh-keygen -o

2. Catch your key just generated before

cat ~/.ssh/id_rsa.pub

3. Put it into your ssh keys in your romote repository

解决使用vs code打开从github上git clone下来的项目，修改后并做git remote关联，在git push时每次都要输入账号和密码

存储全局账号

git config --global credential.helper wincred

git全局配置用户名，因误操作产生多条配置，导致无法修改

产生背景

使用如下错误命令及参数修改配置

git config --global user.name = "M1kewang"

首先修改配置项user.name并不需要等号，也不需要引号

这样配置的结果就是产生了两条user.name，如下

git config -l

user.name=magi
user.name==

即产生了一条user.name值为一个等号的记录

此时再去对user.name这个属性操作即会报错，因为存在两条同属性名的属性，git会混乱，而不知道你要操作的是哪个属性配置

具体报错

warning: user.name has multiple values
error: cannot overwrite multiple values with a single value
       Use a regexp, --add or --replace-all to change user.name.

解决方案

先看一下git存在哪些配置参数

git config

发现里面有个--unset参数，用于remove一个variable（在git中，配置被当做全局变量被存储，这和MySQL很像）

但是尝试这样修改，并不理想，会提示你要修改的属性存在多条记录

warning: user.name has multiple values

正确的方法应该是对这个属性进行批量操作，即对所有同名的属性值进行修改

git config --global --replace-all user.name M1kewang

这样就git会把修改后的两条相同属性合并为一条，恢复正常

Github

上传本地项目到github

1. Get into your project folder and git init, then a .git folder was created.

2. Add your files to git.

git add .

3. Commit your added files to the stage area.

git commit -m "write your comment"

4. Link your local git project with your GitHub repository.

git remote add origin https://github.com/youraccount/yourrepository.git

5. Pull the existed files of your current GitHub repository.

git pull origin master

6. Fix the conflicts if there exist.

7. Push your local project managed by git to your remote GitHub repository.

git push -u origin master

8. Done.

Gitlab

• install-on-ubuntu

Terminal

• nslookup 域名相关

TODO

• nslookup