The following commands/programs will be used/discussed this week:

ifconfig vs. iwconfig
ifup, ifdown
route
traceroute
ping
whois (may need to do yum install jwhois and use jwhois now)
nslookup or dig
netstat
netstat -rn
netstat -ap
netstat -tupan
dhcp

Directories/files

What is TCP/IP?
What is UDP vs TCP?
Of TCP, UDP and IP, which cares about the IP address, and which about the "port number" of the service?
How would you see the status of the present network hardware?
What does netstat -rn give you?
What is DNS? Why is it useful?
What is meant by the internet being a "client-server" setup?
What files control access with xinetd?
Name two servers that xinetd controls?

1. (extra credit) Setting up a pico script so you can use ctrl-z
   • For this assignment, we are going to make a small script that will call pico with the -z options so that ctrl-z will work (ie suspend pico)
   • Locate pico use "which pico"
   • Go to that directory
   • mv pico to pico.orig
   • use vi to create a new file called "pico"
   • In that file type the next two lines
     • #!/bin/bash
     • pico.orig -z $1 $2 $3
   • Save the new pico file
   • DO chmod a+x pico
   • try it out ;)
2. Setup Simple HTTPD/Apache test
3. Setup Simple VSFTPD test (start vsftpd and put a file in /var/ftp/pub)

• Redhat: Configuring a DHCP Server
• Introduction to TCP/IP
• Overview of TCP/IP and the Internet a more technical explanation.
• UDP (wikipedia)
• Sockets Tutorial
  (explains more about TCP and UDP, along with some concepts of client/server, yet it then goes on to be a C/C++ programming tutorial ;)
• Linux wireless
• Gentoo Wireless Howto
• NDISWrappers
• Ubuntu Howto Crack WPA/WPA2 if using WPS Pins