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P2P Networks

Overview of P2P lecture Summer 2010 University of Freiburg

Napster

• Star topology
• Query via server
• Download directly from Peer

Gnutella

• Neighbourhood lists

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gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=merged.pdf *.pdf

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#!/bin/sh
# wrapper to use vimdiff with git
# diff is called by git with 7 parameters:
# path old-file old-hex old-mode new-file new-hex new-mode

mvimdiff "$2" "$5"

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Starting CouchDB...
Eshell V5.7.5  (abort with ^G)
1> Apache CouchDB 1.0.0 (LogLevel=info) is starting.
1> [error] [<0.91.0>] {error_report,<0.35.0>,
    {<0.91.0>,crash_report,
     [[{initial_call,{couch_auth_cache,init,['Argument__1']}},
       {pid,<0.91.0>},
       {registered_name,[]},
       {error_info,
           {exit,

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# figure out name of USB device
diskutil list
# unmount partitions but keep device proper
diskutil unmountDisk /dev/USBSTICK
# write image to USB device
dd if=8.1-RELEASE-amd64-memstick.img of=/dev/USBSTICK bs=10240 conv=sync

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#
# adds 'brew refresh' as an external command, which essentially does
# 'brew update' followed by 'brew outdated'
#
require 'update'

def outdated
  outdated_brews.each do |keg, name, version|
    if $stdout.tty? and not ARGV.flag? '--quiet'
      versions = keg.cd{ Dir['*'] }.join(', ')

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Part I: The Basics

• Install OS X 10.6
• Run System Updates
• Google Chrome Dev [download]
• Google Chrome Beta [download]
• The Unarchiver [download]

Part II: The Essentials

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# treat as binary to prevent newline fixes, showing in diffs and include in merges
# caveat: still shown as conflict in merges, although it won't have changed
 *.pbxproj -crlf -diff -merge

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# latex logic symbols imported from snipt.net
Allquantor = \forall
Existencequantor = \exists
OR = \vee
AND = \wedge
NOT = \neg
Implies = \Rightarrow

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#!/bin/bash
# 
# shell script to invoke gvim with working directory as default
# created for easier use of gvim in a mingw32 environment such as
# the git bash
#

if [ $# == 0 ]
then
    C:\\Programme\\Vim\\vim72\\gvim.exe . &