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# Export AWS Credentials File
function export_aws(){
  # usage: export_aws filename.csv
  # default will be set to credentials.csv if not specified
  file="${1:-credentials.csv}"
  export AWS_ACCESS_KEY_ID=$(tail -1 ${file} | cut -d, -f 3)
  export AWS_SECRET_ACCESS_KEY=$(tail -1 ${file} | cut -d, -f 4)
}

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from datetime import datetime, timedelta
import os
import twitter

'''
  Ephermal twitter tweets written in python
  Inspired by bit.ly/2JXNkpI
  Relies on: github.com/bear/python-twitter
  Runs easily as AWS Lambda: amzn.to/2oif6Wv
  You may set environment variables to control

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# Peevski media group
# Source: https://github.com/openmediabg/dancewithme/blob/master/common/blocked_domains.js
0.0.0.0 monitor.bg
0.0.0.0 telegraph.bg
0.0.0.0 politika.bg
0.0.0.0 europost.eu
0.0.0.0 europost.bg
0.0.0.0 borbabg.com
0.0.0.0 tv7.bg
0.0.0.0 news7.bg

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#!/bin/bash
# Simple command to display the wireless strenght signal
#
clear
while x=1
  do /System/Library/PrivateFrameworks/Apple*.framework/Versions/Current/Resources/airport -I \
    | grep CtlRSSI \
    | sed -e 's/^.*://g' \
    | xargs -I SIGNAL printf "\rWifi dBm: SIGNAL"
  sleep 0.5

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Legend

🏆 - Best Of

Fiction (24)

• John Green - The Fault in Our Stars (Джон Грийн - Вината в нашите звезди) 🏆
• Stephen King - 11/22/63 (Стивън Кинг - 22 ноември 1963) 🏆
• Suzanne Collins - The Hunger Games (Сюзан Колинс - Игрите на глада) 🏆
• Aldous Huxley - Brave New World (Олдъс Хъксли - Прекрасният нов свят)

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List of Linux networking tools

netstat (ss)

Displays contents of /proc/net files. It works with the Linux Network Subsystem, it will tell you what the status of ports are ie. open, closed, waiting, masquerade connections. It will also display various other things. It has many different options. Netstat (Network Statistic) command display connection info, routing table information etc. To displays routing table information use option as -r.

Sample output:

Proto Recv-Q Send-Q  Local Address          Foreign Address        (state)    
tcp4 0 0 127.0.0.1.62132 127.0.0.1.http ESTABLISHED

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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:

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This document is a list with video playlists from recent conferences on DevOps, WebOps, SRE, Systems administration, Monitoring, Building and Scaling Highly available sytems, apps and websites.

Available

• Velocity 2016
• Monitorama 2016
• SREcon16
• ApacheCon NA 2016 wiki
• DevOpsdays Seattle 2016
• ChefConf 2016
• [PuppetConf 2016](https:/

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Internet Scale Services Checklist

A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."

• http://mvdirona.com/jrh/talksandpapers/jamesrh_lisa.pdf

Basic tenets

• Does the design expect failures to happen regularly and handle them gracefully?
• Have we kept things as simple as possible?

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    #!/bin/bash
    # Nico Snyman, nico@gammafly.com, 14/05/2015
    # Change an instance type, while keeping snapshots
    # This script will stop an instance identified by instance ID,
    # take snapshots of all atached volumes, and restart it
    # Use:
    # -i instance ID - REQUIRED - stored in instance_id
    # -t instance new instance type - REQUIRED - stored in instance_type
    # -s if set to 0, no snapshot will be taken, dafault is 1
    #       (take snapshot of attached volumes) - stored in snapshot