takungsk

JSON4S

今現在 java json ライブラリを含めないで 少なくとも 6つの scala向け json ライブラリがあります。

leifg

file_to_disk = './tmp/large_disk.vdi'

Vagrant::Config.run do |config|
  config.vm.box = 'base'

  config.vm.customize ['createhd', '--filename', file_to_disk, '--size', 500 * 1024]
  config.vm.customize ['storageattach', :id, '--storagectl', 'SATA Controller', '--port', 1, '--device', 0, '--type', 'hdd', '--medium', file_to_disk]
end

kitak

コマンドによる「負荷」の原因切り分け

この文章では、Linuxコマンド、sar, top, psを使って、一般的に負荷といわれるものの原因を切り分けることを目的とする。

そもそも負荷とは

「複数のタスクによるサーバリソースの奪い合いの結果に生じる待ち時間」を一言で表した言葉。OSのチューニングとは負荷の原因を知り、それを取り除くことにほかならない。

ボトルネックの見極め作業の大まかな流れ

• ロードアベレージ（処理を実行したくても、実行できなくて待たされているプロセス（CPUの実行権限が与えられるのを待っている、またはディスクI/Oが完了するのを待っている）の数）を見る

joernchen

GitHub RCE by Environment variable injection Bug Bounty writeup

Disclaimer: I'll keep this really short but  I hope you'll get the key points.

GitHub blogged a while ago about some internal tool called gerve:
https://github.com/blog/530-how-we-made-github-fast

Upon git+sshing to github.com gerve basically looks up your permission
on the repo you want to interact with. Then it bounces you further in
another forced SSH session to the back end where the repo actually is.

hwdsl2

List of malware collected in my Kippo SSH Honeypot

This Gist summarizes all malware collected in my Kippo SSH Honeypot from June 2013 to present.

Last updated: March 1, 2016

Link to my blog article with detailed information

Kippo SSH Honeypot (GitHub)

↓  ↓  ↓ Scroll down for the list ↓  ↓  ↓

juanje

I was tired of Chrome eating all my laptop resources so I decided to put some limit to it with cgroup.

As I was using Ubuntu 12.04 with support for cgroup, I installed the package cgroup-bin and add the following group to the file /etc/cgconfig.conf:

group browsers {
    cpu {
#       Set the relative share of CPU resources equal to 25%
        cpu.shares = "256";
 }

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

julianlam

Provisioning and usage of unprivileged LXC containers via indirect login or script

As I've discovered, managing LXC containers is fairly straightforward, but when building out a system for provisioning out user maintained instances of NodeBB, it was imperative that unprivileged LXC containers were used, so that in the event of shell breakout from NodeBB followed by privilege escalation of the saas user, the root user in the LXC container would only be an unprivileged user on the host machine.

During the course of development, I ran into numerous blockers when it came to managing LXC containers in unexpected circumstances. Namely:

• Using LXC in a subshell is not directly supported. This usually happens under one of the following two circumstances:
  • After switching users via su or executing lxc-* commands as another user via sudo
  • Executing lxc-* commands via a program, application, or script. In my case, a Node.js application.

a-r-g-v

Packer+Circle CIでGoogle Compute Engineのイメージを生成する

これは Aizu Advent Calendar 2016 の 9日目の記事(遅刻)です．
http://www.adventar.org/calendars/1530

8日目: オフィスにいる人間をSlackに通知するやつ作った - 人権真骨頂
10日目: @mic_psm

jhaddix

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