Edmund Haselwanter's Blog Feed

Kein Back-To-My-Mac - Verwende VNC über SSH

Sat, 23 Apr 2011 00:00:00 GMT

Wiedereinmal far-far-away und etwas am Rechner im Firmen-, oder Heimnetzwerk vergessen? Kein Problem solange man den SSH Server Dienst einem immer laufenden Mac im Netz laufen hat.

Zuerst brauchen wir einen SSH Tunnel für die VNC Verbindung:

   1  
   2  ssh -NfL 5900:127.0.0.1:5900 user@remote.host
   3

Dann müssen wir am Zielrechner noch die Verwendung mit einem “normalen” VNC Client konfigurieren.
Also mit SSH auf den Rechner und

   1  
   2  sudo sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart \ 
   3  -configure -activate -clientopts -setvnclegacy -vnclegacy yes -setvncpw -vncpw MY_VNC_PASSWORD
   4

Und schon kann man mit einem VNC Client wie beispielsweise Chicken of the VNC den Graphischen Desktop des entfernten Rechners unter localhost erreichen.

Technorati Tags: osx, vnc

Data Driven Deployment of a Java Web Application with Chef Solo and Vagrant

Sat, 16 Apr 2011 00:00:00 GMT

Chef Application Cookbook Showcase

This Vagrant project on github ( https://github.com/iteh/vagrant-demos/ ) showcases the application cookbook for chef

read on iteh.at

Technorati Tags: java, ruby, vagrant

Vagrant, Virtualbox, Chef und Apache2

Sun, 05 Dec 2010 17:51:02 GMT

Auf der iTeh Seite gibt es einen neuen Artikel zu Vagrant, chef-solo und Virtualbox.

Technorati Tags: chef, opschef, opscode, opscookbook, sysadmin, vagrant

Mechanize Screencast and IRB copy history

Fri, 12 Mar 2010 00:00:00 GMT

And again Ryan Bates did a great screencast. This time on mechanize

“Mechanize extends the power of Nokogiri allowing you to interact with multiple pages on the site: click links, submit forms, etc.”

And if you ever wanted to extract the history of an IRB session, here it is:

puts Readline::HISTORY.entries.split("exit").last[0..-2].join("\n")

and another great tool from this episode:

SelectorGadget: point and click CSS selectors

Technorati Tags: ruby

HTTP Basic Auth for Mysql password and old_password in Rails

Mon, 02 Nov 2009 14:52:00 GMT

I recently had to develop a small application for a client. The goal was to add a feature to grown Java web application.

As the software was maintained for several years there are users with old an new MySql passwords in the system.

To authenticate the user I have chosen authenticate_or_request_with_http_basic

As I just needed handful of actions all of them go in one controller:

class MyController < ApplicationController
  before_filter :authenticate<pre class="sunburst"><span class="Keyword">class</span> <span class="JEntityNameType">MyController<span class="EntityInheritedClass"> <span class="EntityInheritedClass">&lt;</span> ApplicationController</span></span>
  before_filter <span class="Constant"><span class="Constant">:</span>authenticate</span>
def index
   # [ … ]

  end
protected
def authenticate
authenticate_or_request_with_http_basic do |id, password|
@user = User.find_by_name(id)
login_ok = @user.authenticate(password)
login_ok
end
end
end


To check if the user can be authenticated:
class User < ActiveRecord::Base
  def authenticate(password)
    user = User.find_by_sql(["select * from user where user_pass=password('%s') \
                              OR user_pass=old_password('%s')",password,password])
    (user.length > 0)?true:false
  end


end

Its a very simple approach.
What do you think?

Technorati Tags: http basic auth, mysql, rails



Kein Back-To-My-Mac - Verwende VNC über SSH
Sat, 23 Apr 2011 00:00:00 GMT
Wiedereinmal far-far-away und etwas am Rechner im Firmen-, oder Heimnetzwerk vergessen? Kein Problem solange man den SSH Server Dienst einem immer laufenden Mac im Netz laufen hat.
Zuerst brauchen wir einen SSH Tunnel für die VNC Verbindung:
   1  
   2  ssh -NfL 5900:127.0.0.1:5900 user@remote.host
   3  

Dann müssen wir am Zielrechner noch die Verwendung mit einem “normalen” VNC Client konfigurieren.

Also mit SSH auf den Rechner und
   1  
   2  sudo sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart \ 
   3  -configure -activate -clientopts -setvnclegacy -vnclegacy yes -setvncpw -vncpw MY_VNC_PASSWORD
   4  

Und schon kann man mit einem VNC Client wie beispielsweise Chicken of the VNC den Graphischen Desktop des entfernten Rechners unter localhost erreichen.

Technorati Tags: osx, vnc


Data Driven Deployment einer Java Web Application mit Chef Solo
Sat, 16 Apr 2011 00:00:00 GMT
Chef Application Cookbook Showcase
Dieses Vagrant Projekt auf unserem Github Repository ( https://github.com/iteh/vagrant-demos/ ) zeigt die Verwendung des Application Cookbooks für Chef
weiterlesen auf iteh.at

Technorati Tags: java, ruby, vagrant


Vagrant, Virtualbox, Chef und Apache2
Sun, 05 Dec 2010 17:51:02 GMT
Auf der iTeh Seite gibt es einen neuen Artikel zu Vagrant, chef-solo und Virtualbox.

Technorati Tags: chef, opschef, opscode, opscookbook, sysadmin, vagrant


Ein Mechanize Screencast  und wie man die Ruby IRB History verwendet
Fri, 12 Mar 2010 00:00:00 GMT
And again Ryan Bates did a great screencast. This time on mechanize
“Mechanize extends the power of Nokogiri allowing you to interact with multiple pages on the site: click links, submit forms, etc.”
And if you ever wanted to extract the history of an IRB session, here it is:
puts Readline::HISTORY.entries.split("exit").last[0..-2].join("\n")
and another great tool from this episode:
SelectorGadget: point and click CSS selectors

Technorati Tags: ruby


HTTP Basic Auth für Mysql Passwort und das alte old_password in Rails
Mon, 02 Nov 2009 14:52:00 GMT
I recently had to develop a small application for a client. The goal was to add a feature to grown Java web application.
As the software was maintained for several years there are users with old an new MySql passwords in the system.
To authenticate the user I have chosen authenticate_or_request_with_http_basic
As I just needed handful of actions all of them go in one controller:

class MyController < ApplicationController
  before_filter :authenticate<pre class="sunburst"><span class="Keyword">class</span> <span class="JEntityNameType">MyController<span class="EntityInheritedClass"> <span class="EntityInheritedClass">&lt;</span> ApplicationController</span></span>
  before_filter <span class="Constant"><span class="Constant">:</span>authenticate</span>
def index
   # [ … ]

  end
protected
def authenticate
authenticate_or_request_with_http_basic do |id, password|
@user = User.find_by_name(id)
login_ok = @user.authenticate(password)
login_ok
end
end
end


To check if the user can be authenticated:
class User < ActiveRecord::Base
  def authenticate(password)
    user = User.find_by_sql(["select * from user where user_pass=password('%s') \
                              OR user_pass=old_password('%s')",password,password])
    (user.length > 0)?true:false
  end


end

Its a very simple approach.
What do you think?

Technorati Tags: http basic auth, mysql, rails