UNIX and Linux System Administration and Shell Programming
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101 Useful Linux Commands - Haydenjames.Io
101 Useful Linux Commands - haydenjames.io Some of these commands require elevated permissions (sudo) to run. Enjoy! 1. Execute the previous command used: !! 2. Execute a previous command starting with a specific letter. Example: !s 3. Short way to copy or backup a file before you edit it. For example, copy nginx.conf cp nginx.conf{,.bak} 4. Toggle between current directory and last directory cd - 5. Move to parent (higher level) directory. Note the space! cd .. 6. Go to home directory cd ~ 7. Go to home directory cd $HOME 8. Go to home directory (when used alone) cd 9. Set permissions to 755. Corresponds to these permissions: (-rwx-r-x-r-x), arranged in this sequence: (owner-group-other) chmod 755 <filename> 10. Add execute permission to all users. chmod a+x <filename> 11. Changes ownership of a file or directory to . chown <username> 12. Make a backup copy of a file (named file.backup) cp <file> <file>.backup 13. Copy file1, use it to create file2 cp <file1> <file2> 14. Copy directory1 and all its contents (recursively) into directory2 cp -r <directory1> <directory2>/ 15. Display date date 16. Zero the sdb drive. You may want to use GParted to format the drive afterward. You need elevated permissions to run this (sudo). dd if=/dev/zero of=/dev/sdb 17. Display disk space usage df -h 18. Take detailed messages from OS and input to text file dmesg>dmesg.txt 19. Display a LOT of system information. I usually pipe output to less. You need elevated permissions to run this (sudo). -
Shell Script & Advance Features of Shell Programming
Kirti Kaushik et al, International Journal of Computer Science and Mobile Computing, Vol.4 Issue.4, April- 2015, pg. 458-462 Available Online at www.ijcsmc.com International Journal of Computer Science and Mobile Computing A Monthly Journal of Computer Science and Information Technology ISSN 2320–088X IJCSMC, Vol. 4, Issue. 4, April 2015, pg.458 – 462 RESEARCH ARTICLE Shell Script & Advance Features of Shell Programming Kirti Kaushik* Roll No.15903, CS, Department of Computer science, Dronacharya College of Engineering, Gurgaon-123506, India Email: [email protected] Jyoti Yadav Roll No. 15040, CS, Department of Applied Computer science, Dronacharya College of Engineering, Gurgaon-123506, India Email: [email protected] Kriti Bhatia Roll No. 15048, CS, Department of Applied Computer science, Dronacharya College of Engineering, Gurgaon-123506, India Email: [email protected] Abstract-- In this research paper, the idea of shell scripting and writing computer programs is examined and different parts of shell programming are likewise contemplated. A shell script is a PC system intended to be controlled by the UNIX shell which is a charge line translator. The different tongues of shell scripts are thought to be scripting dialects. Regular operations performed by shell scripts incorporate document control, program execution, and printing content. A shell script can give an advantageous variety ofa framework order where unique environment settings, charge alternatives, or post-transforming apply naturally, yet in a manner that permits the new script to still go about as a completely typical UNIX summon. The real ideas like Programming in the Borne and C-shell, in which it would be clarified that how shell programming could be possible in Borne and C-shell. -
VMS CRA Y Station Now Available It Is Now Possible to Submit Jobs Functions Closely
VMS CRA Y Station Now Available It is now possible to submit jobs Functions closely. It is implemented as a to the CRAY-1 from UCC's VAX/VMS The VMS station provides these series of commands entered in system. functions: response to the system's $ A CRAY-1 running the cos oper prompt. The commands look like ating system requires another -It submits jobs to the CRAY-1, VMS commands: they have pa computer to act as a "front-end" and returns output as a file un rameters and /qualifiers; they fol system. You prepare jobs and der the user's VMS directory. low much the same syntax and data on the front-end system, us -It transfers files between the interpretation rules (for example, ing whatever tools that system machines using the cos AC wild cards are handled correctly); provides, then submit the files as QUIRE and DISPOSE commands. and they prompt for required a batch job to the CRAY for proc The source of an ACQUIREd file parameters not present on the essing. Output is returned to the can be disk or tape; the desti command line. You can always front-end system for viewing. nation of a DISPOSEd file can recognize a station command, The software that runs on the be disk, tape, printer, or the though, because it always begins front-end machine to provide this VMS batch input queue. with the letter C. For example, communication is called a -At your option, it sends bulle the station command to submit a "station." tins to the terminal chronicling job to the CRAY is CSUBMIT. -
Examining the Hamilton C Shell
EXAMINING ROO M Examining the Hamilton C Shell Unix power for OS/2 Scott Richman tarting OS/2 for the first time was, file system), long filenames, and threads. in the background and the server will for me, like unlocking a Ferarri, Additionally, the Shell supports large be kept busy. sitting behind its wheel and find command lines and pipes (up to 64K) ing a Yugo's dash. What a disap and includes faster and more powerful Supporting Procedures pointment. Sure, the engine and utilities than those supplied with OS/2. Script programmers can create C Shell suspensionS were first rate, but the con This is more than Unix - this is a pow procedures, which are more like func trols were minimal, the clutch was stiff, erful requirement for development un tions: They accept a parameter list and and the pedals were nonresponsive! der OS/2. The ability to execute C shells return a value. These procedures are OS/2 comes with great stuff, but CMD simultaneously in different Presenta compiled into C Shell memory and are .EXE, the default command-line pro tion Manager (PM) text windows con then executed as new shell commands. cessor, is poor compared to the pow verts your PC into a flexible workstation. Procedures can greatly extend the erfuloperating system beneath. CMD.EXE The Hamilton C Shell comes with power and flexibility of your environ appears to be a port of the MS-DOS many programs and shell scripts. To ment. COMMAND.COM and lacks the major install the Shell, you simply copy the As an example, consider ZCW.CSH features of a serious front end. -
Cray Product Installation and Configuration
Cray Product Installation and Configuration Scott E. Grabow, Silicon Graphics, 655F Lone Oak Drive, Eagan, MN 55121, [email protected] ABSTRACT: The Common Installation Tool (CIT) has had a large impact upon the installation process for Cray software. The migration to CIT for installation has yielded a large number of questions about the methodology for installing new software via CIT. This document discusses the installation process with CIT and how CIT’s introduction has brought about changes to our installation process and documentation. 1 Introduction • Provide a complete replacement approach rather than an incremental software approach or a mods based release The Common Installation Tool (CIT) has made a dramatic change to the processes and manuals for installation of UNICOS • Provide a better way to ensure that relocatable and source and asynchronous products. This document is divided into four files match on site after an install major sections dealing with the changes and the impacts of the • Reduce the amount of time to do an install installation process. • Support single source upgrade option for all systems 2 Changes made between UNICOS 9.0 and Some customers have expressed that the UNICOS 9.0 instal- UNICOS 10.0/UNICOS/mk lation process is rather hard to understand initially due to the incremental software approach, the number of packages needed With the release of UNICOS 9.2 and UNICOS/mk the pack- to be loaded, and when these packages need to be installed. Part aging and installation of Cray software has undergone major of the problem was the UNICOS Installation Guide[1] did not changes when compared to the UNICOS 9.0 packaging and present a clear path as what should be performed during a installation process. -
1992 Cern School of Computing
ORGANISATION EUROPEENNE POUR LA RECHERCHE NUCLEAIRE CERN EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH 1992 CERN SCHOOL OF COMPUTING Scuola Superiore G. Reiss Romoli, L'Aquila, Italy 30 August-12 September 1992 PROCEEDINGS Editor: C. Verkerk GENEVA 1993 © Copyright CERN, Genève, 1993 Propriété littéraire et scientifique réservée Literary and scientific copyrights reserved in pour tous les paya < 11» inonde. Ce document ne all countries of the world. This report, or peut être reproduit ou traduit en tout ou en any part of it. may not be reprinted or trans partie sans l'autorisation écrite du Directeur lated without written permission ol the copy général du CERN, titulaire du droit d'auteur. right holder, the Director-General of CERN. Dans les cas appropriés, et s'il s'agit d'utiliser However, permission will be freely granted for le document à des fins non commerciales, cette appropriate non-commercial use. autorisation sera volontiers accordée. If any patentable invention or registrable Le CERN ne revendique pas la propriété des design is described in the report. CERN makes inventions brevetables et dessins ou modèles no claim to property rights in it but offers i( susceptibles de dépôt qui pourraient être for the free use of research institutions, man décrits dans le présent document ; ceux-ci peu ufacturers and others. CERN, however, may vent être librement utilisés par les instituts de oppose any attempt by a user to claim any recherche, les industriels et autres intéressés. proprietary or patent rights in such inventions Cependant, le CERN se réserve le droit de or designs as may be described in the present s'opposer à toute revendication qu'un usager document. -
Vector Vs. Scalar Processors: a Performance Comparison Using a Set of Computational Science Benchmarks
Vector vs. Scalar Processors: A Performance Comparison Using a Set of Computational Science Benchmarks Mike Ashworth, Ian J. Bush and Martyn F. Guest, Computational Science & Engineering Department, CCLRC Daresbury Laboratory ABSTRACT: Despite a significant decline in their popularity in the last decade vector processors are still with us, and manufacturers such as Cray and NEC are bringing new products to market. We have carried out a performance comparison of three full-scale applications, the first, SBLI, a Direct Numerical Simulation code from Computational Fluid Dynamics, the second, DL_POLY, a molecular dynamics code and the third, POLCOMS, a coastal-ocean model. Comparing the performance of the Cray X1 vector system with two massively parallel (MPP) micro-processor-based systems we find three rather different results. The SBLI PCHAN benchmark performs excellently on the Cray X1 with no code modification, showing 100% vectorisation and significantly outperforming the MPP systems. The performance of DL_POLY was initially poor, but we were able to make significant improvements through a few simple optimisations. The POLCOMS code has been substantially restructured for cache-based MPP systems and now does not vectorise at all well on the Cray X1 leading to poor performance. We conclude that both vector and MPP systems can deliver high performance levels but that, depending on the algorithm, careful software design may be necessary if the same code is to achieve high performance on different architectures. KEYWORDS: vector processor, scalar processor, benchmarking, parallel computing, CFD, molecular dynamics, coastal ocean modelling All of the key computational science groups in the 1. Introduction UK made use of vector supercomputers during their halcyon days of the 1970s, 1980s and into the early 1990s Vector computers entered the scene at a very early [1]-[3]. -
UNICOS® Installation Guide for CRAY J90lm Series SG-5271 9.0.2
UNICOS® Installation Guide for CRAY J90lM Series SG-5271 9.0.2 / ' Cray Research, Inc. Copyright © 1996 Cray Research, Inc. All Rights Reserved. This manual or parts thereof may not be reproduced in any form unless permitted by contract or by written permission of Cray Research, Inc. Portions of this product may still be in development. The existence of those portions still in development is not a commitment of actual release or support by Cray Research, Inc. Cray Research, Inc. assumes no liability for any damages resulting from attempts to use any functionality or documentation not officially released and supported. If it is released, the final form and the time of official release and start of support is at the discretion of Cray Research, Inc. Autotasking, CF77, CRAY, Cray Ada, CRAYY-MP, CRAY-1, HSX, SSD, UniChem, UNICOS, and X-MP EA are federally registered trademarks and CCI, CF90, CFr, CFr2, CFT77, COS, Cray Animation Theater, CRAY C90, CRAY C90D, Cray C++ Compiling System, CrayDoc, CRAY EL, CRAY J90, Cray NQS, CraylREELlibrarian, CraySoft, CRAY T90, CRAY T3D, CrayTutor, CRAY X-MP, CRAY XMS, CRAY-2, CRInform, CRIlThrboKiva, CSIM, CVT, Delivering the power ..., DGauss, Docview, EMDS, HEXAR, lOS, LibSci, MPP Apprentice, ND Series Network Disk Array, Network Queuing Environment, Network Queuing '!boIs, OLNET, RQS, SEGLDR, SMARTE, SUPERCLUSTER, SUPERLINK, Trusted UNICOS, and UNICOS MAX are trademarks of Cray Research, Inc. Anaconda is a trademark of Archive Technology, Inc. EMASS and ER90 are trademarks of EMASS, Inc. EXABYTE is a trademark of EXABYTE Corporation. GL and OpenGL are trademarks of Silicon Graphics, Inc. -
Ascii, Baudot, and the Radio Amateur
ASCII, BAUDOT AND THE RADIO AMATEUR George W. Henry, Jr. K9GWT Copyright © 1980by Hal Communications Corp., Urbana, Illinois HAL COMMUNICATIONS CORP. BOX365 ASCII, BAUDOT, AND THE RADIO AMATEUR The 1970's have brought a revolution to amateur radio RTTY equipment separate wire to and from the terminal device. Such codes are found in com and techniques, the latest being the addition of the ASCII computer code. mon use with computer and line printer devices. Radio amateurs in the Effective March 17, 1980, radio amateurs in the United States have been United States are currently authorized to use either the Baudot or ASCII authorized by the FCC to use the American Standard Code for Information serial asynchronous TTY codes. Interchange(ASCII) as well as the older "Baudot" code for RTTY com munications. This paper discusses the differences between the two codes, The Baudot TTY Code provides some definitions for RTTY terms, and examines the various inter facing standards used with ASCII and Baudot terminals. One of the first data codes used with mechanical printing machines uses a total of five data pulses to represent the alphabet, numerals, and symbols. Constructio11 of RTTY Codes This code is commonly called the Baudot or Murray telegraph code after the work done by these two pioneers. Although commonly called the Baudot Mark Ull s,.ce: code in the United States, a similar code is usually called the Murray code in other parts of the world and is formally defined as the International Newcomers to amateur radio RTTY soon discover a whole new set of terms, Telegraphic Alphabet No. -
Through the Years… When Did It All Begin?
& Through the years… When did it all begin? 1974? 1978? 1963? 2 CDC 6600 – 1974 NERSC started service with the first Supercomputer… ● A well-used system - Serial Number 1 ● On its last legs… ● Designed and built in Chippewa Falls ● Launch Date: 1963 ● Load / Store Architecture ● First RISC Computer! ● First CRT Monitor ● Freon Cooled ● State-of-the-Art Remote Access at NERSC ● Via 4 acoustic modems, manually answered capable of 10 characters /sec 3 50th Anniversary of the IBM / Cray Rivalry… Last week, CDC had a press conference during which they officially announced their 6600 system. I understand that in the laboratory developing this system there are only 32 people, “including the janitor”… Contrasting this modest effort with our vast development activities, I fail to understand why we have lost our industry leadership position by letting someone else offer the world’s most powerful computer… T.J. Watson, August 28, 1963 4 2/6/14 Cray Higher-Ed Roundtable, July 22, 2013 CDC 7600 – 1975 ● Delivered in September ● 36 Mflop Peak ● ~10 Mflop Sustained ● 10X sustained performance vs. the CDC 6600 ● Fast memory + slower core memory ● Freon cooled (again) Major Innovations § 65KW Memory § 36.4 MHz clock § Pipelined functional units 5 Cray-1 – 1978 NERSC transitions users ● Serial 6 to vector architectures ● An fairly easy transition for application writers ● LTSS was converted to run on the Cray-1 and became known as CTSS (Cray Time Sharing System) ● Freon Cooled (again) ● 2nd Cray 1 added in 1981 Major Innovations § Vector Processing § Dependency -
Wildlife Management Activities and Practices
WILDLIFE MANAGEMENT ACTIVITIES AND PRACTICES COMPREHENSIVE WILDLIFE MANAGEMENT PLANNING GUIDELINES for the Edwards Plateau and Cross Timbers & Prairies Ecological Regions Revised April 2010 The following Texas Parks & Wildlife Department staff have contributed to this document: Mike Krueger, Technical Guidance Biologist – Lampasas Mike Reagan, Technical Guidance Biologist -- Wimberley Jim Dillard, Technical Guidance Biologist -- Mineral Wells (Retired) Kirby Brown, Private Lands and Habitat Program Director (Retired) Linda Campbell, Program Director, Private Lands & Public Hunting Program--Austin Linda McMurry, Private Lands and Public Hunting Program Assistant -- Austin With Additional Contributions From: Kevin Schwausch, Private Lands Biologist -- Burnet Terry Turney, Rare Species Biologist--San Marcos Trey Carpenter, Manager, Granger Wildlife Management Area Dale Prochaska, Private Lands Biologist – Kerr Wildlife Management Area Nathan Rains, Private Lands Biologist – Cleburne TABLE OF CONTENTS Comprehensive Wildlife Management Planning Guidelines Edwards Plateau and Cross Timbers & Prairies Ecological Regions Introduction Specific Habitat Management Practices HABITAT CONTROL EROSION CONTROL PREDATOR CONTROL PROVIDING SUPPLEMENTAL WATER PROVIDING SUPPLEMENTAL FOOD PROVIDING SUPPLEMENTAL SHELTER CENSUS APPENDICES APPENDIX A: General Habitat Management Considerations, Recommendations, and Intensity Levels APPENDIX B: Determining Qualification for Wildlife Management Use APPENDIX C: Wildlife Management Plan Overview APPENDIX D: Livestock -
Unix and Linux System Administration and Shell Programming
Unix and Linux System Administration and Shell Programming Unix and Linux System Administration and Shell Programming version 56 of August 12, 2014 Copyright © 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011, 2012, 2013, 2014 Milo This book includes material from the http://www.osdata.com/ website and the text book on computer programming. Distributed on the honor system. Print and read free for personal, non-profit, and/or educational purposes. If you like the book, you are encouraged to send a donation (U.S dollars) to Milo, PO Box 5237, Balboa Island, California, USA 92662. This is a work in progress. For the most up to date version, visit the website http://www.osdata.com/ and http://www.osdata.com/programming/shell/unixbook.pdf — Please add links from your website or Facebook page. Professors and Teachers: Feel free to take a copy of this PDF and make it available to your class (possibly through your academic website). This way everyone in your class will have the same copy (with the same page numbers) despite my continual updates. Please try to avoid posting it to the public internet (to avoid old copies confusing things) and take it down when the class ends. You can post the same or a newer version for each succeeding class. Please remove old copies after the class ends to prevent confusing the search engines. You can contact me with a specific version number and class end date and I will put it on my website. version 56 page 1 Unix and Linux System Administration and Shell Programming Unix and Linux Administration and Shell Programming chapter 0 This book looks at Unix (and Linux) shell programming and system administration.