bodom_lx at task3 dot cc

As I promised about 4 hours ago, here is my introduction to Hyper Text Transfer Protocol in form of a mind map.
It is to be intended as a really short introduction to this protocol. Like the previous one about computer networks, the mindmap summarizes materials copyrighted by Tanenbaum and also material taken from Wikipedia.

The topics covered are:

• Scope of the protocol
• HTTP connection
  • HTTP/1.0
  • HTTP/1.1
• HTTP request methods:
  • GET
  • HEAD
  • PUT
  • POST
  • DELETE
  • TRACE
  • CONNECT
  • OPTIONS
• Message Headers
  • Request Headers – all
  • Response Headers – all
• Status Codes:
  • 1xx Information
  • 2xx Success
  • 3xx Redirection
  • 4xx Client error
  • 5xx Server Error
• Sessions:
  • Cookies
  • Server-Side sessions
• Secure HTTP – HTTPS:
  • By URI scheme
  • HTTP Upgrade Header
  • SSL/TLS

You can browse an HTML version online.

You can download:

• Mindmap source file (Freemind)
• An export in PDF format
• An export in PNG format

As always, you are free and encouraged to contact me in case of errors or anything else.
Hope you like it!

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You can find your favourite linux distribution at linode.com, a great hosting service where I’m transferring my blog and all other services I need. They offer great cheap VPS solutions, and you can choose Archlinux from the available linux distributions.
Archlinux is currently in testing: for example, ssh will not work after a fresh install. Here I’m going to explain how to fix this and how to access your VPS.

After the installation of Archlinux, if you try to connect to ssh, you will receive this error:

ssh yourUsername@yourIP
ssh: connect to host yourIP port 22: Connection refused

That’s because Archlinux does not install the openssh server by default. Let’s install it!
Linode offers a workaround to connect to your machines, called Lish, the LInode SHell. From this shell, you will be able then to connect to your machines.

ssh yourLinodeUsername@yourLinodeHost.linode.com

Where yourLinodeUsername is the username you chose for Linode registration, and yourLinodeHost is the host address of the machine (you can see it in this page, after a login: https://www.linode.com/members/remote.cfm, it’s in the form hostNUMBER).

You will be then prompted to Archlinux console. Use your root access and install ssh:

pacman -Sy
pacman -S openssh

Add sshd to your deamons array in /etc/rc.conf

DAEMONS=(… sshd …)

If you try to connect to your account via ssh, you will get another error at this time, because you need to allow external internet connections to the ssh daemon.
Your /etc/hosts.allow should look like this:

sshd: ALL

Start opensshd (/etc/rc.d/sshd start) or reboot the machine, you’re finished!

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I’ve just finished with the new server. Everything should work now, even the broken download links.
Why isn’t my work finished? I would like to write a KeWL download manager in php for my blog, and a new stats system: I’m using php-stats, which are complete and well made, but too much heavy for my server

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Verso fine mese mi trasferirò su un nuovo spazio web, un server virtuale privato (vps), per avere controllo totale della macchina e soprattutto la password di root
Ci saranno dei downtime sicuramente..

I’m going to transfer my blog on a brand new VPS by the end of March. You will surely experience downtime problems.

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