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Introduction to UNIX
Karl Harrison September 2004
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The UNIX Operating System
An operating system (or "OS") is a set of programs that controls a computer
It controls both the hardware (things you can touch—such as
keyboards, displays, and disk drives)software (application programs that you
run, such as a word processor).
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The UNIX Operating System
Some computers have a single-user OS, which means only one person can use the computer at a time. They can also do only one job at a time.
But if it has a multiuser, multitasking operating system like UNIX. Then these powerful OSes can let many people use the computer at the same time and let each user run several jobs at once.
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Versions of UNIX
Now there are many different versions of UNIX.
At first there were two main versions: The line of UNIX releases that started at
AT&T (the latest is System V Release 4), And from the University of California at
Berkeley (the latest version is BSD 4.4).
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Versions of UNIX
Now commercial versions include SunOS, Solaris, SCO UNIX, SG IRIX, AIX, HP/UX
The freely available versions include Linux and FreeBSD 5.2 (based on 4.4BSD)Many Versions of Linux - Redhat, Fedroa,
Debian, SuSE and MandrakeSoftApple Mac OS X (FreeBSD 5.2)
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What is different with UNIX
Hard
ware
Hard
ware
UN
IX K
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UN
IX K
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Serv
ices
Serv
ices
Com
man
ds &
Sh
ell
Com
man
ds &
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GU
IG
UI
Use
r Applica
tions
Use
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tions
Other Users
X W
ind
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sX
Win
dow
s
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UNIX GUI’s -Apple OS X 10.4
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UNIX GUI’s -Apple OS X 10.4
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UNIX GUI’s -Fedora KDE
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UNIX GUI’s -Solaris
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UNIX GUI’s -SG IRIX
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Remote UNIX log on
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Oxford UNIX System
OUCS provides a general-purpose cluster of computers running Debian GNU/Linux.
The service is available to any University member who has a Herald account, and is accessed using Herald username and password on secure login to linux.ox.ac.uk. http://www.oucs.ox.ac.uk/services/linux/
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UNIX Tutorials
Maui High Performance Computing Centrehttp://www.mhpcc.edu/training/vitecbids/UnixIntro/UnixIntro.html
Alsohttp://www.chem.ox.ac.uk/course/unix/unix.html
Vi Editorhttp://www.eng.hawaii.edu/Tutor/vi.html