parse

/* Compile with: g++ -Wall –Werror -o shell shell.c */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
 
#include <sys/types.h>
#include <sys/wait.h>

jacksonfdam

//Regular Expressions List

//Short Tutorial 

\	// the escape character - used to find an instance of a metacharacter like a period, brackets, etc.
.	// match any character except newline
x	// match any instance of x
^x	// match any character except x
[x]	// match any instance of x in the bracketed range - [abxyz] will match any instance of a, b, x, y, or z
|	// an OR operator - [x|y] will match an instance of x or y

soarez

How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

michaelBenin

requirements_file = 'base.pip'

requirements = open(requirements_file, 'r')
content = requirements.read().splitlines()
content = list(set(content))
content.sort(key=lambda y: y.lower())
content = '\n'.join(content)

file = open('sorted_'+requirements_file, 'w')
file.write(content)

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:

tcalmant

#!/usr/bin/python3
# -- Content-Encoding: UTF-8 --
"""
Small script which is able to look for and install packages targeting another
platform, using pip.

This simplifies the creation of distribution files for different platform.

Only works for Python 3.4 downloads.

allhailwesttexas

{% macro render_pagination(pagination, endpoint) %}

  <ul class="pagination">

    {% if pagination.has_prev %}
      <li>
        <a href="{{ url_for(endpoint, page=pagination.prev_num) }}" aria-label="Previous">
          <span aria-hidden="true">&laquo;</span>
        </a>
      </li>

glen-cheney

Encoding Video

Installing

Install FFmpeg with homebrew. You'll need to install it with a couple flags for webm and the AAC audio codec.

brew install ffmpeg --with-libvpx --with-libvorbis --with-fdk-aac --with-opus

michaellihs

SSH Server with the Python Twisted Library

Installing the library

Assuming you have Python installed on your system:

pip install twisted
pip install pyOpenSSL
pip install service_identity

carlbennett

# Fix user and directory permissions:
find . -type f -print0 | sudo xargs -0 chmod 664
find . -type d -print0 | sudo xargs -0 chmod 775

# Copy user permissions to group permissions:
chmod -R g=u .

# Make new files inherit the group of the container directory
chmod g+s <directory>