Transcript Computer Resources at Pitt and an Introduction to the Unix

Computer Resources at Pitt
and Introduction to the the
Pitt Main Frame Computer
Class Objectives
Raise student awareness of computing resources
available at the University of Pittsburgh
Students will access their Unix account
Student will create a web page on their Unix
account that contains 2 links and one image file
Students will learn how to move files with FTP
Computer Labs at Pitt
Falk Library
Benedum Hall
Cathedral of Learning
David Lawrence
Posvar Hall
Hillman Library
Sutherland Hall
Alumni Hall
Software Licensing at Pitt
More info at http://technology.pitt.edu/software_hardware.html
Adobe Acrobat Professional ($35)
Microsoft Office ($0)
ArcView ($10)
MiniTab ($5)
Clementine ($10)
Norton Anti-Virus ($0)
EndNote ($5)
Oracle ($5)
MathCad ($5)
SAS ($10)
Mathematica ($10)
S-Plus ($10)
MatLab ($10)
SPSS ($10)
CSSD
Student
Toolkit
CD
Computer Accounts
Students, faculty and staff have access to the Pitt
network, including:
an email account
and
a unix account
Computer Services
All Pitt faculty students and staff have access to
the Pitt computer store. Go there first to buy
Hardware and Software
Computer Store will help with configuration and
installation
Technology Help Desk
The Technology Help Desk is staffed 24 hours per day, 7
days per week (closed holidays) and serves as a single
point of contact for all information technology services.
University of Pittsburgh students, faculty and staff can
contact the Help Desk regarding any computer issue
including e-mail, hardware, software, networking, ResNet,
University Computer Accounts, computing labs, and other
services.
Help desk 624-4357
What’s a Unix Account?
Most Universities run mainframe (huge)
computers that use the unix operating system
If you’re a Pitt student you have a unix account
Pitt maintains this account for you, backs up the
data, keeps it running 24 hours a day, 7 days
week.
UNIX Operating
System
Stable
Used by Main Frame Computers
Allows many users to have separate accounts
on the same machine
Used world wide for web servers
UNIX Operating
System
Maintained by University
Data backed up each night
Lots of free scientific software has been
developed for Unix
Unix is the base for new OS’s for personal
computers including Linux and Mac OSX
Pitt Maintains Unix
Mainframe Computers
Student and Faculty have Unix accounts by
default
email address = username @ pitt.edu
mcs2 is my username
[email protected] is my email address
mcs2 is my UNIX username
UNIX is a Command
Line Environment
Not as easy to use, therefore less popular
But more powerful too!
Why Should I Bother
to Learn Unix?
Maybe you shouldn’t.... but
Almost all bioinformatics processes are run
in a Unix environment
Lots of FREE software for DNA/protein
sequence analysis is available on Unix
Sharing data/images with colleagues and
friends
How to Access your
Unix Account
Log on via Telnet ( HSLS.. programs >
Internet aps > Telnet shortcuts > unixs)
host = unixs.cis.pitt.edu
Enter username and password at prompt
ls
command lists directories and files
UNIX uses a Hierarchical
File system
When you log on, you are in your home
directory
You can always return to your home directory
by typing cd
(change directory)
You can go down the directory tree by typing
cd <dirname>
You can go up one level with
cd ..
Directory Access
Your Home directory should have
directories called public and
private
File access is controlled at the directory
level
Web pages must be in your
directory
public
Anyone can read the contents of your
public directory
Basic UNIX Commands
Basic commands are listed on a web page
under Tutorial #1
Everybody should log in to their accounts
In-Class Exercise
Create directory needed to host web pages
Create your own web page
Address will be www.pitt.edu/~username
How do you make and
remove a directory?
The command for creating a new directory
is mkdir <dirname>
To remove a directory, the command is
rmdir <dirname>
A directory MUST be empty before it can
be removed
Create the ‘html’
Directory
Pitt allows web broswers to access web
pages in your Unix account
Web pages must be inside a directory
called ‘html’ that is located inside your
‘public’ directory
Create the ‘html’
Directory
log on to you Unix account
go inside public
cd public
create new directory called html
mkdir html
go inside html
cd html
What’s a path?
The path to a directory is
the listing of all directories
in the hierarchy.
The path to file3 is
dir1/dirB/file3
Separator for directories
is a forward slash /
More on paths
The path to your html directory is
public/html
The Unix OS keeps track of your ‘current
working directory’
You can always get the complete path by
typing pwd
(print working directory)
The abbreviation for the current directory
is ./
How do you create or
edit a text file?
Unix provides several text editors
The easiest to use is ‘pico’
To launch pico, type
pico <file1>
If ‘file1’ already exists, you open it and can
edit it. If file1 does not exist, pico creates
it.
Using PICO
Pico is a simple text editor
Typing text will enter it into the file
Use the arrow keys to move your cursor
pico commands are listed at the bottom and
are invoked with the Cntl key
(^X = Cntl X)
Screen Shot of pico
More Pico
To exit a file, type
Cntl-X (^X)
If the file (buffer) was modified, you will
be asked whether you want to save the
changes. The answer is yes (y) or no (n)
You can save to a new name or
OVERWRITE the existing name
Once a file is OVERWRITTEN on Unix,
there is no UNDO ... caution
More Pico: ^X
More Pico: ^X
What’s a Web Page?
Web pages are text files that are meant to
be ‘rendered’ or formatted by a browser
Browsers use HTTP (hypertext transfer
protocol)
Browsers read html files (hypertext
markup language)
HTML Basics
HTML uses tags
tags are enclosed in <brackets>
(less than and greater than signs <>)
<b> = start bold text
</b> = stop bold text
HTML Basics
<b>BOLD</b>
<i> italics </i>
<u> underline </u>
Headings:
<H1>
Biggest </H1>
<H2> Big </H2>
<H3>
Not so Big</H3>
.... etc <H6>
A Very Basic Web Page
<HTML>
This is my web page!
</HTML>
Another Basic Web
Page
<HTML>
<head>
<title>Martin’s Page</title>
</head>
<H1>This is my web page!</H1>
</HTML>
Make your own page
Make sure you are inside your public/html
directory
Edit your page text with pico
Save your page as
welcome.html
View your page with a browser. The
address will be www.pitt.edu/~username
Add a link to your page
<a href=”http://www.pitt.edu”>Pitt Home page</a>
complete address (URL) = http://www.pitt.edu
Link on your page will say “Pitt Home page”
Add an image to your
page
<img> tag needs a source of the image, usually a .gif
or .jpg file
here’s one from the Pitt web page
<img src =
”http://technology.pitt.edu/images/pittb_01.gif”>
How do you borrow
(steal) from other
sites?
View source !!
Sample Web Pages
View sample web pages on your browsers
View source
Complex Web Pages
You can create complex web pages using
programs like Microsoft ‘FrontPage’
You can create web pages with Microsoft
Word using the save as web page command
Make Your Own Web
Page
Pitt allows you to host web pages in your
unix account - free
Your home directory for web pages is
inside your public/html directory
The web address for public/html is
www.pitt.edu/~username
The name for this web page must be
welcome.html
Make Your Own Web
Page
Go to your home directory
Go to public/html
cd
cd public/html
Create welcome.html
pico welcome.html
Add an Image to Your
Web Page
Connect to your UNIX account using an FTP
program
Transfer the image file as “Raw Data”
Add the image to your page with the
<img src=“image.jpg”> tag