ChuckJHardy

Install Gource

brew install gource

Convert Quicktime Movie to Animated Gif

ffmpeg -i in.mov -s 600x400 -pix_fmt rgb24 -r 10 -f gif - | gifsicle --optimize=3 --delay=3 > out.gif

Record Gource

reachlin

  // For all the confusing Prometheus configuration and
  // regular expressions,
  // explained in examples.


  // Remember, there are default values for each item if it's missing.
  // regex is (.*),
  // replacement is $1,
  // separator is ;
  // ,and action is replace 

zfael

var fs = require('fs');
var crypto = require('crypto');

fs.readFile('file.pdf', function(err, data) {
  var checksum = generateChecksum(data);
  console.log(checksum);
});

function generateChecksum(str, algorithm, encoding) {
    return crypto

npearce

UPDATE (March 2020, thanks @ic): I don't know the exact AMI version but yum install docker now works on the latest Amazon Linux 2. The instructions below may still be relevant depending on the vintage AMI you are using.

Amazon changed the install in Linux 2. One no-longer using 'yum' See: https://aws.amazon.com/amazon-linux-2/release-notes/

Docker CE Install

sudo amazon-linux-extras install docker
sudo service docker start

pirate

#!/usr/bin/env bash

### Bash Environment Setup
# http://redsymbol.net/articles/unofficial-bash-strict-mode/
# https://www.gnu.org/software/bash/manual/html_node/The-Set-Builtin.html
# set -o xtrace
set -o errexit
set -o errtrace
set -o nounset
set -o pipefail

sergeyklay

Journalctl Cheat Sheet

Configuration

Permissions

To see messages from other users and the system as well as performing various log operations from a regular user add it to the group:

sudo usermod -aG systemd-journal $USER

waseem-h

Requirements

There are 18 questions in total. You will need five RHEL 8 (or CentOS 😎 virtual machines to be able to successfully complete all questions.

Optional Automatic Exam Setup Available

Here is an automated exam environment deployment for Mac/Linux/Windows that deploys the practice exam environment for you, including IPA server/client installation and configuration. You can also use your own lab environment. Navigate to the respective repo you wish to use for this practice exam and follow the README instructions:

https://github.com/rdbreak/rhce8env, https://github.com/rdbreak/ansible27env, https://github.com/rdbreak/ansible8env.

19317362

shadowsocks + privoxy/tsocks

• shadowsocks: service, socks proxy
• privoxy: service, convert socks proxy to http proxy
• tsocks: tool, use socks proxy for any command line

Usage

tested under ubuntu14.04