introduction to unix linux pdf

... Technology Services Directory Navigation and Control Commands 20–22 pwd print working directory cd change working directory (“go to directory) mkdir make a directory rmdir remove directory University ... vary from system to system — see the man pages University Technology Services In the Introduction to UNIX document 3 • shell programming • Unix command summary tables • short Unix bibliography ... machine the user is logged into uname [options] has additional options to print info about system hardware and software University Technology Services History of Unix 7–8 1960s multics project...

Ngày tải lên: 07/11/2013, 10:15

... data that is stored in both Microsoft SQL Server databases and DB/2 databases. You need to select the best technology to connect to these databases. What technology can be used to perform the ... only when you deploy to a private assembly that is stored together with the application. For shared assemblies that are available to all applications on the computer, you need to register the assembly ... in forcing the client to restart the connection. You write the following code segment to connect to the database to solve the problem: Public Sub DBCon(ConStr As String) ' Connect to the database Try '...

Ngày tải lên: 11/12/2013, 14:15

... Introduction to Semiconductors & Diodes EE106 Analogue Electronics Supplementary Notes F. O’Malley April 2005 Silicon Energy Band Diagram • When an electron jumps to the conduction ... connected to the n region, and the positive terminal is connected to the p region n-Type Semiconductors • n-type material is formed by adding pentavalent (5 valence electrons) impurity atoms – ... in Semiconductors - Doping • In an intrinsic semiconductor, there are relatively few free electrons – pure semi-conductive materials are neither good conductors nor good insulators • Intrinsic...

Ngày tải lên: 13/12/2013, 23:15

... by comma (csh) ˜ user’s own home directory (csh) ˜ user home directory of specified user (csh) University Technology Services History shortcuts in csh 53 % history nn prints last nn commands % !! repeats ... Technology Services History 52–53 C Shell, Korn shell and others retain information about former commands executed within the shell • Use history and savehist variables to set number of commands ... forms: • Anchors — tie the pattern to a location on the line • Character sets — match a single character at a single position • Modifiers — specify how many times to repeat the previous expression Regular...

Ngày tải lên: 14/12/2013, 14:15

... save the file to. Click on Desktop and select the folder you created on the desktop. Then click Save and the image will be saved to the directory on the desktop. To add the image to your page, ... Introduction to Netscape Composer ® Updated February, 00 Welcome to the Introduction to Netscape Composer. This handout is divided into five sections: Inserting ... connection to another Web page). Creating hyperlinks in Composer is very straightforward. • Click the link icon in the button toolbar. A window will pop up asking you to enter text to display....

Ngày tải lên: 15/12/2013, 02:15

... second to last equation to get the second to last unknown. This is repeated until the entire system is solved. An Introduction to Linear Algebra Barry M. Wise and Neal B. Gallagher Eigenvector Research, ... way to calculate X + . x y p Figure 2. The Projection of the vector y onto the vector x. We may also be interested in the projection of a point y onto a subspace. For instance, we may want to ... is the zero matrix to within machine precision. Vector Spaces and Subspaces Before continuing on it is useful to introduce the concept of a vector space. The most important vector spaces are denoted...

Ngày tải lên: 17/01/2014, 04:20

... difficult as the problem of factoring a large integer into its prime factors Another intractable problem that appears to have useful properties that we can use to build a cryptosystem upon is the difficulty ... ©2001 6 Concepts in Cryptography 3 Example: RSA • based on difficulty of factoring a large integer into its prime factors • ~1000 times slower than DES • considered “secure” •de facto standard • patent ... opportunity to see first-hand what it takes to develop a cryptographic algorithm. The development process is inherently complex, and the only realistic way to reduce the risk is to open up the...

Ngày tải lên: 17/01/2014, 07:20

... Specification Creation Module 12: Introduction to Functional Specifications Module 12: Introduction to Functional Specifications 448 Module 12: Introduction to Functional Specifications ... to include a chart that translates mandated project variables into explicit design goals. Use prototypes in the functional specification and the review process. Prototypes are invaluable tools ... snapshot Prototyping is a technique used to validate the functional specification by allowing the team and the customer to visualize different aspects of the solution. Prototypes help clarify...

Ngày tải lên: 17/01/2014, 09:20

... is used to refer to the content of a variable variable1=${variable2} • The braces are essentially used to delimit the variable name. • The command to assign the value of today variable to x variable ... customize the environment. • Some of the environment variables are: • HOME: Stores the location of the HOME directory of a user • PATH: Contains a list of colon-delimited path names of directories ... palindrome" fi Linux Shells • Some of the popular shells available in Linux are: • Bash: • Is an acronym for ‘Bourne Again Shell’ and is the default shell for most Linux systems • Uses...

Ngày tải lên: 21/01/2014, 17:20

... due at the beginning of every laboratoryperiod.Thelaboratoryinstructorwilllook to seeifthestudentsattempted to answerallofthe prelaboratory questions and a score will be ... completion.Chem63laboratoryinstructors willinitialthe datasheetsforthelaboratoryreportsattheendofthelaboratoryperiod.Theseoriginaldatasheetsare to be turned in as ... the student’s laboratory report. The complete laboratory report includes the prelaboratory questions and the original laboratory report sheets. Students are to work by themselves inst...

Ngày tải lên: 24/01/2014, 04:20

... nhau. Đơn giản, nhất quán, đó là tư tưởng chủ đạo của Unix. II. Unix/ Linux Chương I. Tổng quan hệ thống Unix 1. Cấu trúc hệ thống Cấu trúc của Unix Unix có thể xem như một loại kim tự tháp với các ... Used directory count The group descriptors are placed on after another and together they make the group descriptor table. Each Blocks Group contains the entire table of group descriptors after ... be the directory entry for the '/' directory. The EXT2 Group Descriptor Each Block Group has a data structure describing it. Like the Superblock, all the group descriptors for all...

Ngày tải lên: 25/01/2014, 17:20

Ngày tải lên: 21/02/2014, 22:20

... An Introduction to ATM Networks Harry Perros An Introduction to ATM Networks 8 view to facilitating the international exchange of goods and services, and to developing ... by station A to indicate to station B the current status of the ARQ from B to A, and N(S) is used by station A to indicate the sequence number of the frame that it is transmitting to B. S- frames ... function is to transform the raw transmission link provided by the physical layer into a reliable communications link. This was deemed An Introduction to ATM Networks 24 This protocol is widely...

Ngày tải lên: 22/02/2014, 05:20

... response to ping  Improper response to ARP queries  Improper response to DNS queries  Source routing to suspicious node  Employing a honeypot  Network latency monitoring  Time-domain reflectometers  ... Ethernet, ARP, RARP  Programming Environment:  Unix & C (Mostly Linux and ANSI C)  CASL (Custom Audit Scripting Language) Introduction to TCP/IP R/L =Http Request and Reply TH/F = TCP ... network protocols and services.  Mechanisms to protect networks.  Security tools. Overview of This Course  TCP/IP Suite  Vulnerabilities and solutions  Security protocols built on top of TCP/IP ...

Ngày tải lên: 14/03/2014, 22:20

... person may vary from 1.5m to 1.8m • weight of a person may vary from 90lb to 300lb • income of a person may vary from $10K to $1M © Tan,Steinbach, Kumar Introduction to Data Mining 40 1 nearest-neighbor Voronoi ... classification © Tan,Steinbach, Kumar Introduction to Data Mining 43 Nearest Neighbor Classification… Scaling issues – Attributes may have to be scaled to prevent distance measures from being ... 0 0 0 0 1 vs d = 1.4142 d = 1.4142 • Solution: Normalize the vectors to unit length © Tan,Steinbach, Kumar Introduction to Data Mining 5 Rule Coverage and Accuracy Coverage of a rule: – Fraction...

Ngày tải lên: 15/03/2014, 09:20

... Algorithms Lecture Notes for Chapter 6 Introduction to Data Mining by Tan, Steinbach, Kumar © Tan,Steinbach, Kumar Introduction to Data Mining 1 © Tan,Steinbach, Kumar Introduction to Data Mining 22 Subset ... BCD D:1 © Tan,Steinbach, Kumar Introduction to Data Mining 13 Found to be Infrequent Illustrating Apriori Principle Pruned supersets © Tan,Steinbach, Kumar Introduction to Data Mining 33 Alternative ... (NM) – Use efficient data structures to store the candidates or transactions – No need to match every candidate against every transaction © Tan,Steinbach, Kumar Introduction to Data Mining 4 Definition:...

Ngày tải lên: 15/03/2014, 09:20

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