CSE 101 Lab I

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CSE 101 Lab I
OPERATING SYSTEMS
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OPERATING SYSTEM an interface between the user
and the architecture (implements a virtual
machine that is hopefully easier to program than
the machine language of the raw hardware )
EX provides - the file system - virtual
memory - networking - CPU scheduling -
time-sharing Dos, Windows, Linux, Unix
... Examples for operating systems
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DOS Disk Operating System
The main use of DOS is the organization of data.
DIRECTORY STRUCTURE
Erhan
CSE101
(folders)
(files)
Lecture1.doc Lecture2.doc Lecture3.doc
lectures
exams
CSE 315
lectures
exams
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Today, (most) computers start with
Windows Windows 2000, Windows XP
STARTING YOUR COMPUTER
Either CTRLALTDEL to log on (2000), Or
password directly (XP)
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SHUTTING DOWN YOUR COMPUTER
LOG OFF - TURN OFF buttons/options
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Crashing computers
CTRLALTDEL
(if you have to resort to this, or sometimes even
harsher, methods give your computer 60 sec.
before restarting, so that the spinning parts of
your computer stop)
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Use HELP whenever there is something wrong and
you dont know what to do!!! Read TROUBLESHOOTING
Windows Explorer
Drag and drop Copy and paste Cut and paste
To choose files SHIFTclick CTRL click
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Looking for files???
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SETTINGS AND CONTROL PANEL
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MY COMPUTER
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The Internet Age
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INTERNET a series of computers networked
together worldwide
1969 US Department of Defense developed a
computer network for the military ARPANET
Advance Research Projects Agency - Network
Today, there is no single owner of the internet
!!!
Two (or more) computers connected together (for
printing, etc purposes) LOCAL AREA NETWORK (LAN)
WIDE AREA NETWORK (WAN) Spans a large physical
distance. The Internet is the largest WAN,
spanning the Earth. WLAN - Wireless Local Area
Network MAN - Metropolitan Area Network ...
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Usually make the connection through a
MODEM (modulator / demodulator)
PORTS specific post office windows through
which you wait in line collect the specific
information requested (eg. e-mail)
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ISP Internet Service Provider
eg after the Dial-up connection, your computer
activates a Winsock (Windows Socket) Winsock
allows the computer to communicate with the
outside world through
TCP / IP Transmission Control Protocol and
Internet Protocol
1) IP address like a phone defines a host
machine or a gateway
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2) PORT number like the of each application
eg. HTTP PORT 80 POP3 PORT 110 SMTP
PORT 25
IP address PORT SOCKET
(DNS Domain Name System can give the domain
name, and search the IP )
Internet connection IP 205.217.201.3port80 ht
tp//www.arrl.org URL Uniform Resource Locator
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SMTP Simple Mail Transport Protocol SMTP is
used when email is delivered from an email
client, to an email server or when email is
delivered from one email server to another.
POP3 Post Office protocol 3 POP3 allows an
email client to download an email from an email
server. Its design assumes that the email client
downloads all available email from the server,
deletes them from the server and then
disconnects.
IMAP Internet Message Access Protocol It, is
also a protocol that an email client can use to
download email from an email server. However,
IMAP includes many more features than POP3. The
IMAP protocol is designed to let users keep their
email on the server.
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(No Transcript)
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Electronic Mail
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SSH Client Software SSH Secure File Transfer
Client
Your computer
Remote computer
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LAB HOMEWORK
1- Subscribe to the CSE101 mailing
list cse101_at_cse.yeditepe.edu.tr 2- Download
the SSH Secure File Transfer Client free demo
version Using the passwords given to you for
your user account and the SSH Client Software,
create 2 directories