DanFolkes

programmers blog

Archive for April, 2008

QR(Quick Response) Codes

Apr 21

Posted by Daniel in Thoughts | No Comments

qrwikimessThis is an image of the first paragraph on QR Codes on Wikipedia embedded in a QR code. I made it using this page: http://qrcode.kaywa.com/

“A QR Code is a matrix code (or two-dimensional bar code) created by Japanese corporation Denso-Wave in 1994. The “QR” is derived from “Quick Response”, as the creator intended the code to allow its contents to be decoded at high speed. QR Codes are common in Japan where they are currently the most popular type of two dimensional code.” – Wikipedia

QR Codes are basically our standard bar codes, but super amp’d up so they can hold a lot more information.

Here are some examples: Read the rest of this entry »

SSH/SCP/SFTP I love them all.

Apr 7

Posted by Daniel in Software | No Comments

ssh_binary_packet_alt_sm.jpg
I pretty much use ssh for everything. I use it mostly to connect to my home/web/this server and use it as an interface. The best program to use alongside ssh is screen.

To install both ssh and screen, you may do this:

  1. sudo apt-get install ssh
  2. sudo apt-get install screen

If I were good with words, I would write a poem for ssh. But alas, I am not. So, you get the first page from the Wikipedia Entry.

Secure Shell or SSH is a network protocol that allows data to be exchanged over a secure channel between two computers. Encryption provides confidentiality and integrity of data. SSH uses public-key cryptography to authenticate the remote computer and allow the remote computer to authenticate the user, if necessary.

Here are a few of the best SSH/SCP commands EVER:

  1. ssh server.com
  1. scp server.com:./ /home/local/downloadhere/
    Popular/Best SSH/SCP/Clients (mostly for windows, because linux usually already has tools built in.):

  • WinSCP
  • Putty
  • gFTP
  • the normal commands that come with Linux(ssh, scp)