trydofor

docker ps // 查看所有正在运行容器
docker stop containerId // containerId 是容器的ID

docker ps -a // 查看所有容器
docker ps -a -q // 查看所有容器ID
docker stop $(docker ps -a -q) //  stop停止所有容器
docker  rm $(docker ps -a -q) //   remove删除所有容器

trydofor

# default editor 
export EDITOR=vim
# editor
visudo
# feedback password
Defaults        env_reset, pwfeedback
# moilioncircle group sudo without password
%moilioncircle ALL=NOPASSWD: ALL

trydofor

Java 中对final 字段的修改，有很多黑魔法。

org/apache/commons/lang3/reflect

https://stackoverflow.com/questions/3301635/change-private-static-final-field-using-java-reflection/31268945#31268945

# System.in,out,err允许重定向

``` java
import java.lang.reflect.*;

trydofor

通过例子学 Rust
https://rustwiki.org/zh-CN//rust-by-example/

RustPrimer
https://rustcc.gitbooks.io/rustprimer/content/

Redox 操作系统
https://www.redox-os.org/

trydofor

#!/bin/bash

cd  /data/publish/jiayu-bbs

# log git version to jar
version=src/main/resources/version.txt
git branch -v > $version
git log --pretty=format:'%h - %an, %ad : %s' --graph -10 >> $version

# delete config

trydofor

#ssh隧道有3种类型：

#动态端口转发（Socks 代理）-D

ssh -D 9090 ssh-host

产生一个本地sock5代理，端口是9090

#本地端口转发（正向代理）-L

trydofor

    public static void main(String[] args) throws ParseException {
        SimpleDateFormat s = new SimpleDateFormat("yyyy-MM-dd");
        Calendar c = Calendar.getInstance();
        c.set(2017,10,30); // 月份从0开始，10标识11月
        System.out.println(s.format(c.getTime()));
        c.add(Calendar.MONTH,3); // 月末对齐
        System.out.println(s.format(c.getTime()));

        Date d = s.parse("2017-13-45"); // 会有解析错误么？不会

trydofor

#!/bin/bash
cat << EOF
#On Client:
[ -d ~/.ssh ] || mkdir .ssh
[ -f ~/.ssh/id_rsa.pub ] || ssh-keygen -t rsa
cat ~/.ssh/id_rsa.pub

# On Server
[ -d ~/.ssh ] || mkdir .ssh
cat >>~/.ssh/authorized_keys <<END

trydofor

# POST
curl --include
  --request POST
  --header "Content-type: application/json" 
  --data '{"name":"Nuthanger Farm","location":{"lat" : 51.244031,"long" : -1.263224}}' 
  http://localhost:9000/trydofor

# GET
curl --include http://localhost:9000/trydofor

trydofor

#!/bin/bash

pkg=`echo $1 | tr '.' '/'`
mkdir -p src/{main,test}/resources
mkdir -p src/{main,test}/java/$pkg