P7h

tmux vs. screen commands

---

Action	tmux	screen
start a new session	tmux tmux new tmux new-session	screen
start a new session with a name	tmux new -s name	screen -S name
re-attach a detached session	tmux attach tmux attach-session	screen -r
re-attach a detached session with a name	tmux attach -t name tmux a -t name	screen -r name
re-attach an attached session (detaching it from elsewhere)	tmux attach -dtmux attach-session -d	screen -dr

olivermt

package com.mtdevelopment.loadbalancer;


import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.socket.DatagramPacket;

import java.net.InetSocketAddress;
import java.util.Random;

wendelb

#
# This background job automatically locks your Workstation after a specified amount of
# time. It will come in handy if you cannot access the screensaver settings due to policy
# restriction but want to lock your screen after a idle timeout. Or you could just
# press [Win]+[L] everytime you leave your desk ;) .
#
# start with
# 	powershell.exe -windowstyle hidden -executionpolicy Unrestricted P:\ATH\TO\logoff.ps1
#
# `-windowstyle hidden` will make your PowerShell disappear/run in background

pablitoc

##Install AWS CLI Tools##

1. Install AWS CLI Tools. You can also use the EC2 API Tool if you are more comfortable with them. But this write-up uses the EC2 CLI.
2. Create a user via Amazon IAM or download the security accessID and securitykey you will need it to query Amazon CLI.
3. using Terminal cd into .aws directory cd ~/.aws edit or create new file named config paste the following contents inside.
   `[default]`
   `aws_access_key_id = ACCESS_ID`
   `aws_secret_access_key = SECRET_ID`
   `output = json OR bson OR text`
   `region = PREFERRED_AWS_REGION`

Save the file as "config"

kenjij

# Download the legacy format for NGINX compatibility
wget http://geolite.maxmind.com/download/geoip/database/GeoLiteCountry/GeoIP.dat.gz
wget http://geolite.maxmind.com/download/geoip/database/GeoLiteCity.dat.gz
# Unzip
gunzip Geo*.gz
# Copy to /usr/share/GeoIP/
cp Geo*.dat /usr/share/GeoIP/

sivel

Better SSH Authorized Keys Management

A seemingly common problem that people encounter is how to handle all of your users authorized_keys file.

People struggle over management, ensuring that users only have specific keys in the authorized_keys file or even a method for expiring keys. A centralized key management system could help provide all of this functionality with a little scripting.

One piece of functionality overlooked in OpenSSH is the AuthorizedKeysCommand configuration keyword. This configuration allows you to specify a command that will run during login to retrieve a users public key file from a remote source and perform validation just as if the authorized_keys file was local.

Here is an example directory structure for a set of users with SSH public keys that can be shared out via a web server:

shamil

How to mount a qcow2 disk image

This is a quick guide to mounting a qcow2 disk images on your host server. This is useful to reset passwords, edit files, or recover something without the virtual machine running.

Step 1 - Enable NBD on the Host

modprobe nbd max_part=8

chrisveness

/**
 * Encode string into Base64, as defined by RFC 4648 [http://tools.ietf.org/html/rfc4648].
 * As per RFC 4648, no newlines are added.
 *
 * Characters in str must be within ISO-8859-1 with Unicode code point <= 256.
 *
 * Can be achieved JavaScript with btoa(), but this approach may be useful in other languages.
 *
 * @param {string} str ASCII/ISO-8859-1 string to be encoded as base-64.
 * @returns {string} Base64-encoded string.

JamesMGreene

Initialize

gitflow	git
git flow init	git init
	git commit --allow-empty -m "Initial commit"
	git checkout -b develop master

Connect to the remote repository

ggrandes

#!/bin/bash
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.