UCF CIS 3003 - Lecture Notes (23 pages)

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Lecture Notes



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Lecture Notes

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Pages:
23
School:
University of Central Florida
Course:
Cis 3003 - Fundamentals of Information Technology
Fundamentals of Information Technology Documents

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Why Learn Unix or its variations Many Unix systems Solaris on Sun workstations IRIX on SGI workstations AIX on IBM servers various versions of Linux on PCs FreeBSD OpenBSD Unix provided the basis since 1970s for many operating system concepts and features multi tasking shell and scripting hierarchical file systems Apple Computer s Mac OS X is Unix based see a wikipedia article and a brief Unix timeline Mac OS X and Unix articles tutorial advanced Unix howto s The Law Enforcement and Forensic Examiner s Introduction to Linux v 3 65 by Barry J Grundy Layered Structure of the Unix Linux Operating System Application User Interface AUI Application programmer s Interface API Applications GUI web browser word processor ftp etc Shells sh bash csh tcsh etc Language libraries C Java Ada FORTRAN System calls open close fork Unix kernel Operating System File system process manager memory manager CPU scheduler Device drivers Hardware CPU RAM BIOS hard disk CD ROM monitor Unix file systems The Unix operating system started out as a file system All system entities are considered as files including regular files text or binary directories devices links pipes and sockets A typical file system tree looks as follows root bin boot dev etc home lib lost found mnt opt proc root sbin tmp usr var bin binary executable images of commands such as cat chmod cp kill ls mkdir mv ps pwd rm rmdir su vi boot image of kernel to boot the system dev devices special files including character special and block special etc configuration information home user home directories lib language libraries for C C Java Ada FORTRAN lost found files not connected to other directory which are found using the tool fsck file system check mnt mount points for other file systems such CD ROM floppy using the mount command opt add on packages proc process task information root information about the root administrator account sbin system administration tools such as init shutdown tmp temporary files used by several



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