Shichao An shichao-an

How to upgrade the Linux Kernel of debian 8 jessie

Debian 8 のカーネルをアップグレードする方法です。

Environment

Microsoft Windows Server 2012 R2
Hyper-V
Debian 8.2 jessie

So you want to create a pex that packages your script and its dependencies?

Ok - first to make our script! Call it foo.py:

import requests

if __name__ == '__main__':
  req = requests.get("https://raw.githubusercontent.com/pantsbuild/pex/master/README.rst")
  print req.text.split("\n")[0]

SSH agent forwarding and screen

When connecting to a remote server via SSH it is often convenient to use SSH agent forwarding so that you don't need a separate keypair on that server for connecting to further servers.

This is enabled by adding the

ForwardAgent yes

option to any of your Host entries in ~/.ssh/config (or alternatively with the -A option). Don't set this option in a wildcard Host * section since any user on the remote server that can bypass file permissions can now als use keys loaded in your SSH agent. So only use this with hosts you trust.

How to get a free StartSSL.com SSL certificate

I'm writing this up from memory, so errors may appear.

This has been updated to use SHA256 certificates.

Start

Go to http://www.startssl.com/
Click on 'Control Panel'

SSL 设计目标:

防内容篡改
防冒充服务器身份
加密通信内容

而翻墙的目标:

不被检测出客户端在访问什么网站
不被检测出服务器在提供翻墙服务

	/* 东方曲按同人曲数量排名 */

	U.N.Owen Was Her?: 262
	亡き王女の為のセプテット: 256
	恋色マスタースパーク: 248
	幽雅に咲かせ、墨染の桜～ Border of Life: 237
	ネクロファンタジア: 188
	上海紅茶館　～ Chinese Tea: 169
	おてんば恋娘: 166
	竹取飛翔　～ Lunatic Princess: 163

	0.0.0.0
	1.1.80.147
	1.1.127.45
	1.33.190.70
	1.33.191.58
	1.209.208.200
	1.234.1.235
	1.234.2.155
	1.234.4.97
	1.234.17.34

	Below are the Big O performance of common functions of different Java Collections.


	List \| Add \| Remove \| Get \| Contains \| Next \| Data Structure
	---------------------\|------\|--------\|------\|----------\|------\|---------------
	ArrayList \| O(1) \| O(n) \| O(1) \| O(n) \| O(1) \| Array
	LinkedList \| O(1) \| O(1) \| O(n) \| O(n) \| O(1) \| Linked List
	CopyOnWriteArrayList \| O(n) \| O(n) \| O(1) \| O(n) \| O(1) \| Array

	Producer

	Setup
	bin/kafka-topics.sh --zookeeper esv4-hcl197.grid.linkedin.com:2181 --create --topic test-rep-one --partitions 6 --replication-factor 1
	bin/kafka-topics.sh --zookeeper esv4-hcl197.grid.linkedin.com:2181 --create --topic test --partitions 6 --replication-factor 3

	Single thread, no replication

	bin/kafka-run-class.sh org.apache.kafka.clients.tools.ProducerPerformance test7 50000000 100 -1 acks=1 bootstrap.servers=esv4-hcl198.grid.linkedin.com:9092 buffer.memory=67108864 batch.size=8196