INLS102 Week3: UNIX Intro UNIX file directory system

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INLS102 Week3UNIX IntroUNIX file directory
system

• Date 9/13/05
• Instructor Leo Cao

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Objectives for today

• listserv.unc.edu
• Networking leftover-view
• Knowing where you are in a file directory system,
  and how to move elsewhere
• UNIX intro

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Class Exercise for Network Configuration

• Windows commands hostname, ipconfig, nslookup,
  ping, tracert, arp
• Open Windows command interpreter Start / Run /
  type 'cmd'
• hostname (hostname of a host computer) hostname
• ipconfig (network configuration settings)
  ipconfig /all
• nslookup (domain name server lookup) nslookup
  isis.unc.edu (nslookup 152.2.1.217)
• ping (send an echo request to a host for response
  times) ping www.unc.edu
• tracert (trace the route to a host) tracert
  www.ils.unc.edu (www.jomc.unc.edu,
  www.cs.unc.edu, www.lis.uiuc.edu)
• arp (Address Resolution Protocol IP to Ethernet
  address map or to a physical machine address)
  arp -a
• To get help, type 'command /help' ping /help,
  ipconfig /help, arp /help
• type 'exit' or 'c' (CTRL-c) when in trouble

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Unix file directory system

• Picture the upside down tree, the first level is
  called the root
• The branches, or folders, can contain sub-folders
• You are currently located in one of those boxes,
  if you are in the mary folder, your current
  location is, /users/mary

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Trees and trees

• The windows file directory system is based off
  the unix one, so its just about the same
• Burn the tree structure into your head, know
  where you are, and be able to move to where you
  want to be
• the pwd command shows your current location in
  the directory

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Roots and folders

• pwd stands for print working directory
• the displayed path is between the Root of the
  directory to your current folder.
• Moving up and down the folders
• Use cd (change directory)
• cd .. Moves one level up
• cd folder_name Moves one level down

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Directory navigation exercise

• Exercise A
• Determine you current directory location, record
  the path
• Move up to the root of the directory
• Move back to the original location you started
  from
• Exercise B
• Navigate to my public folder, located at,
  /afs/isis.unc.edu/home/l/c/lcao/public

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UNIX Intro

• An operating system
• First designed at ATT's Bell Laboratories in
  1969
• Linux -- Linus Unix, open source variant of UNIX
• 1991, a student named Linus Torwalds from Finland

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Why UNIX?

• Pros
• Stable
• Greater processing power
• Higher security
• Low cost (debatable)
• Cons
• Not as user friendly as windows.
• Not as many compatible software

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UNIX basics

• The simplest and most important UNIX commands you
  have to know by heart by soul, or at least to
  pass this class,
• Print working directory, pwd
• Change directory, cd
• List, ls

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UNIX Basic Commands

• telnet to isis, cd public_html, mkdir Inls102,
  makes a folder
• display the current directory type pwd (print
  working directory)
• cd (change directory)
• display the directory list ls (ls -l or ls -a or
  ls -al)
• copy
• move
• delete
• rename
• mkdir (make directory/folder)
• rmdir (remove directory/folder)
• Man (manual, help command)

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For Thursday

• Assignment 1 Due on Thursday
• Readings as usual