inadarei

Network Classes

IP Addresses identify both a network as well as host on a network. Depending on the class of a network, certain amount of bits in the IP (32 bits overall) are allocated for network adressing and the rest is for: adressing the host on the network.

1. Class A: first octet is network, last three: host
2. Class B: first two octets are for network, last two: host
3. Class C: first three octets are for network, only last octet is for host.

Furthermore, looking at the IP itself, you can tell which class of IP it is, using the following rules:

aweijnitz

#!/bin/bash

sudo apt-get -y install cups
sudo apt-get -y install cups-pdf

# add pdf printer to cups 
#   - named files end up in ~/PDF/
#   - unnamed files are stored in /var/spool/cups-pdf/ANONYMOUS/, such as PDF:s created by streaming bytes over an API 
sudo lpadmin -p cups-pdf -v cups-pdf:/ -E -P /usr/share/ppd/cups-pdf/CUPS-PDF.ppd

gbrks

#! /bin/bash
#######################################################################
# this is a helper script that keeps SnapRAID parity info in sync with
# your data. Here's how it works:
#   1) it first calls diff to figure out if the parity info is out of sync
#   2) if there are changed files (i.e. new, changed, moved or removed),
#         it then checks how many files were removed.
#   3) if the deleted files exceed X (configurable), it triggers an
#         alert email and stops. (in case of accidental deletions)
#   4) otherwise, it will call sync.

skamithi

#!/bin/bash

# Script to create ansible playbook directories

# define your roles here
roles=(upgrade packages)
directories=(tasks handlers files default vars templates)

# create playbook
mkdir global_vars

epicserve

Convert SVN Repositories to Git Repositories

This guide on how to convert an SVN repository to a git repository was mostly taken from John Albin Wilkins post on Converting a Subversion repository to Git.

1. Retrieve a list of all Subversion committers

: