Linux Commands Cheat Sheet by Sue Whelan Via Cheatography.Com/47090/Cs/13580

Total Page：16

File Type：pdf, Size：1020Kb

Linux Commands Cheat Sheet by Sue Whelan via cheatography.com/47090/cs/13580/ Nano Seacrhes Standard Commands Bash Shortcuts Screen Shortucts (cont) Files ls list directory content Ctrl-c Stop current command Ctrl-A Activate commands for screen Ctrl-R Read File cd.. change directory Ctrl-z Sleep program Ctrl-A Create a new instance of Ctrl-O Save file cp copy files Ctrl-a Go to start of line c terminal Ctrl-X Close File mv move files Ctrl-e Go to end of line Ctrl- Go to the next instance of echo Echo text Ctrl-u Cut from start of line Copy and Paste A n a terminal cat display file content Ctrl-k Cut to end of line Alt- A Start Marking Text Ctrl-A Go to the previous instance Ctrl-K Cut marked text or Line ls-- accessing help Ctrl-r Search history p of a terminal help Ctrl-U Paste Text !! Repeat last command Ctrl-A show current instances of rm delete file " terminals Navigate File !abc Run last command clear screen clear starting with abc Ctrl - Rename the current ALT-/ End of file touch file creation !abc:p Print last command A A instance Ctrl-A Beginning of line file1 starting with abc Process Managem ent Ctrl-E End of line mkdir create directory !$ Last argument of ps Show snapshot of Ctrl-C Show line number previous command ls list the content of the processes Ctrl-_ Go to line number current directory ALT-. Last argument of top Show real time processes previous command Search File la -a lists all files including kill Kill processes with id pid Ctrl-W Find hidden files !* All arguments of pid previous command Alt-W Find Next ls -1 displays permiss ions, pkill Kill process with name owners, size, date etc ^ abc Run previous name name Ctrl-\ Search and Replace 123 command replacing -R copies a directory its files killall Kill all processes with and subdire cto ries to a abc with 123 Getting Help name names beginning with destina tion directory Bash Variabl es name command displays help rmdir remove an empty env Show environ ment --help message directory variables man shows manual for touch create an empty file echo Output value of command that command file $NAME $NAME who am i gives full details of the find starts a find from the export Set $NAME to value user directory and searches NAME= whoami gives name of user the whole subtree from va lue that point on $PATH Executable search path locate check the database to see $HOME Home Directory if a file matches the supplied name, won't work $SHELL Current Shell on recent files as database is only updated Screen Shortucts once a day screen Start a screen session screen Resume a screen -r session screen Show your current -list screen sessions By Sue Whelan Not published yet. Sponsored by Readability-Score.com cheatography.com/sue-whelan/ Last updated 30th November, 2017. Measure your website readability! Page 1 of 1. https://readability-score.com.

Copy Link

Recommended publications

Beginning Portable Shell Scripting from Novice to Professional
Beginning Portable Shell Scripting From Novice to Professional Peter Seebach 10436fmfinal 1 10/23/08 10:40:24 PM Beginning Portable Shell Scripting: From Novice to Professional Copyright © 2008 by Peter Seebach All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage or retrieval system, without the prior written permission of the copyright owner and the publisher. ISBN-13 (pbk): 978-1-4302-1043-6 ISBN-10 (pbk): 1-4302-1043-5 ISBN-13 (electronic): 978-1-4302-1044-3 ISBN-10 (electronic): 1-4302-1044-3 Printed and bound in the United States of America 9 8 7 6 5 4 3 2 1 Trademarked names may appear in this book. Rather than use a trademark symbol with every occurrence of a trademarked name, we use the names only in an editorial fashion and to the benefit of the trademark owner, with no intention of infringement of the trademark. Lead Editor: Frank Pohlmann Technical Reviewer: Gary V. Vaughan Editorial Board: Clay Andres, Steve Anglin, Ewan Buckingham, Tony Campbell, Gary Cornell, Jonathan Gennick, Michelle Lowman, Matthew Moodie, Jeffrey Pepper, Frank Pohlmann, Ben Renow-Clarke, Dominic Shakeshaft, Matt Wade, Tom Welsh Project Manager: Richard Dal Porto Copy Editor: Kim Benbow Associate Production Director: Kari Brooks-Copony Production Editor: Katie Stence Compositor: Linda Weidemann, Wolf Creek Press Proofreader: Dan Shaw Indexer: Broccoli Information Management Cover Designer: Kurt Krames Manufacturing Director: Tom Debolski Distributed to the book trade worldwide by Springer-Verlag New York, Inc., 233 Spring Street, 6th Floor, New York, NY 10013.
[Show full text]
Linux Hardening Techniques Vasudev Baldwa Ubnetdef, Spring 2021 Agenda
Linux Hardening Techniques Vasudev Baldwa UBNetDef, Spring 2021 Agenda 1. What is Systems Hardening? 2. Basic Principles 3. Updates & Encryption 4. Monitoring 5. Services 6. Firewalls 7. Logging What is System Hardening? ⬡ A collection of tools, techniques, and best practices to reduce vulnerability in technology applications, systems, infrastructure, firmware, and other areas ⬡ 3 major areas: OS vs Software vs Network ⬠ When have we done hardening in this class before? ⬠ This lecture is focusing mostly on OS and software level Why Harden? ⬡ Firewalls can only get us so far, what happens when at attack is inside the network? ⬠ If you have nothing protecting your systems you are in trouble ⬡ We want some kind of secondary protection A Few Cybersecurity Principles ⬡ Zero Trust Security ⬠ Instead of assuming everything behind the firewall is safe, Zero Trust verifies each request as though it originates from an unsecure network ⬡ Principle of Least Privilege ⬠ Only privileges needed to complete a task should be allowed ⬠ Users should not have domain administrator/root privileges ⬡ Principle of Least Common Mechanism ⬠ Mechanisms used to access resources should not be shared in order to avoid the transmission of data. ⬠ Shared resources should not be used to access resources The Threat Model ⬡ A process by which potential threats can be identified and prioritized. ⬠ If you have a web server that feeds input to a mysql database, then protecting against mysql injections would be prioritized in your model. 2 considerations ⬡ *nix like is a very
[Show full text]
Processes and Job Control
Processes and Job Control Hour 17 PObjectives < Definitions: process, orphan, and zombie < System processes < Process creation < Examining processes: the ps command < Job control: &, nohup, fg, bg, jobs, ( ), and kill < Exit status Copyright © 1998-2002 Delroy A. Brinkerhoff. All Rights Reserved. Hour 17 Unix Slide 1 of 12 Process Also called a job by C and Korn shells PWhen a program or executable file is loaded from disk and started running (i.e., when a command is run), it is called a process vi pid 641 < identified by a unique process ID (PID) number < has an owner vi < private data vi PA program can be loaded more than once pid 895 < creates multiple processes vi < each process has a different PID < each process may have a different owner PPIDs are unique, nonnegative integers < numbers recycle without collisions Hour 17 Unix Slide 2 of 12 System Processes Processes created during system boot P0System kernel < “hand crafted” at boot < called swap in older versions (swaps the CPU between processes) < called sched in newer versions (schedules processes) < creates process 1 P1 init (the parent of all processes except process 0) < general process spawner < begins building locale-related environment < sets or changes the system run-level P2 page daemon (pageout on most systems) P3 file system flusher (fsflush) Hour 17 Unix Slide 3 of 12 Process Life Cycle Overview of creating new processes fork init init pid 467 Pfork creates two identical pid 1 exec processes (parent and child) getty pid 467 Pexec < replaces the process’s instructions
[Show full text]
Multiresolution Recurrent Neural Networks: an Application to Dialogue Response Generation
Multiresolution Recurrent Neural Networks: An Application to Dialogue Response Generation Iulian Vlad Serban∗◦ Tim Klinger University of Montreal IBM Research 2920 chemin de la Tour, T. J. Watson Research Center, Montréal, QC, Canada Yorktown Heights, NY, USA Gerald Tesauro Kartik Talamadupula Bowen Zhou IBM Research IBM Research IBM Research T. J. Watson Research Center, T. J. Watson Research Center, T. J. Watson Research Center, Yorktown Heights, Yorktown Heights, Yorktown Heights, NY, USA NY, USA NY, USA Yoshua Bengioy◦ Aaron Courville◦ University of Montreal University of Montreal 2920 chemin de la Tour, 2920 chemin de la Tour, Montréal, QC, Canada Montréal, QC, Canada Abstract We introduce the multiresolution recurrent neural network, which extends the sequence-to-sequence framework to model natural language generation as two parallel discrete stochastic processes: a sequence of high-level coarse tokens, and a sequence of natural language tokens. There are many ways to estimate or learn the high-level coarse tokens, but we argue that a simple extraction procedure is sufﬁcient to capture a wealth of high-level discourse semantics. Such procedure allows training the multiresolution recurrent neural network by maximizing the exact joint log-likelihood over both sequences. In contrast to the standard log- likelihood objective w.r.t. natural language tokens (word perplexity), optimizing the joint log-likelihood biases the model towards modeling high-level abstractions. We apply the proposed model to the task of dialogue response generation in arXiv:1606.00776v2 [cs.CL] 14 Jun 2016 two challenging domains: the Ubuntu technical support domain, and Twitter conversations. On Ubuntu, the model outperforms competing approaches by a substantial margin, achieving state-of-the-art results according to both automatic evaluation metrics and a human evaluation study.
[Show full text]
07 07 Unixintropart2 Lucio Week 3
Unix Basics Command line tools Daniel Lucio Overview • Where to use it? • Command syntax • What are commands? • Where to get help? • Standard streams(stdin, stdout, stderr) • Pipelines (Power of combining commands) • Redirection • More Information Introduction to Unix Where to use it? • Login to a Unix system like ’kraken’ or any other NICS/ UT/XSEDE resource. • Download and boot from a Linux LiveCD either from a CD/DVD or USB drive. • http://www.puppylinux.com/ • http://www.knopper.net/knoppix/index-en.html • http://www.ubuntu.com/ Introduction to Unix Where to use it? • Install Cygwin: a collection of tools which provide a Linux look and feel environment for Windows. • http://cygwin.com/index.html • https://newton.utk.edu/bin/view/Main/Workshop0InstallingCygwin • Online terminal emulator • http://bellard.org/jslinux/ • http://cb.vu/ • http://simpleshell.com/ Introduction to Unix Command syntax $ command [<options>] [<file> | <argument> ...] Example: cp [-R [-H | -L | -P]] [-fi | -n] [-apvX] source_file target_file Introduction to Unix What are commands? • An executable program (date) • A command built into the shell itself (cd) • A shell program/function • An alias Introduction to Unix Bash commands (Linux) alias! crontab! false! if! mknod! ram! strace! unshar! apropos! csplit! fdformat! ifconfig! more! rcp! su! until! apt-get! cut! fdisk! ifdown! mount! read! sudo! uptime! aptitude! date! fg! ifup! mtools! readarray! sum! useradd! aspell! dc! fgrep! import! mtr! readonly! suspend! userdel! awk! dd! file! install! mv! reboot! symlink!
[Show full text]
HP-UX Fundamentals
Contact Us: (616) 875-4060 HP-UX Essentials Course Summary Length: 3 Days Prerequisite: Basic computer skills Recommendation Statement: Student should be able to use a computer monitor, keyboard, mouse. Student needs to be able to input commands and control characters from a keyboard. Course Description: For those new to HP-UX, this is the first course you will take. The course starts at the beginner level and works into intermediate and advanced HP-UX commands and utilities. The student is introduced to the HP-UX Korn shell, the command line and command syntax. Although you will be exposed to the various windowing platforms available in HP-UX, this course teaches UNIX at “the command line level” to develop a thorough understanding of the HP-UX operating environment. The student learns how to navigate the HP-UX file systems and how to work with files, directories and permissions. The student will learn how to use the HP-UX editors “ex” and “vi. “ Once the student is comfortable with basic HP-UX commands, they’ll move onto advanced power tools as well as how to customize the POSIX Korn shell. The classroom labs are run in a real-world UNIX environment, are structured to allow you to learn by doing, and are developed to simulate “real world” situations. The hands-on labs progressively build your HP-UX knowledge and command skills in a clear and concise manner. Working in a controlled UNIX classroom environment with an expert instructor, you will learn HP-UX concepts and commands. You will receive professional tips and techniques that will help you build your HP-UX confidence and skills.
[Show full text]
Trimming and Quality Control (2015-06-03)
Trimming and quality control (2015-06-03) Alexander Jueterbock, Martin Jakt∗ PhD course: High throughput sequencing of non-model organisms Contents 1 Overview of sequence lengths2 2 Quality control3 3 Trimming low quality reads and adapters4 4 Fraction of duplicate reads7 5 BONUS Running programs in the background with nohup 7 5.1 Using the process-ID..................................8 5.2 Redirecting output................................... 10 After a general introduction to the UNIX command line, it is time for you to analyze your own fastq files. The first important step for any kind of sequencing data is to get rid of adapter contamination and bad quality reads. In this tutorial we will use the programs FastQC and TrimGalore! to check the quality of the sequenced libraries before and after trimming. We will also learn few more UNIX commands that extract important information from fastq files and that allow you to turn off your computer while the analysis continues to run on the remote server. IMPORTANT NOTE Before you get started: to compare characteristics of your libraries, please keep record of the resulting numbers, like the number of raw reads, reads after quality control, number of mapped reads etc. This helps to identify peculiarities/outliers in your libraries which may either be due to biological peculiarities of your species or unknown technical issues. Log on (with ssh) to the remote computer with the -X option to be able to use graphical interfaces. ∗University of Nordland, Norway 1 1 Overview of sequence lengths Next Generation Sequencing data is generally stored in fastq files. Most of the time the data are compressed, either in .zip or in .gz format.
[Show full text]
Download the Sample Pages
Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and the publisher was aware of a trademark claim, the designations have been printed with initial capital letters or in all capitals. The authors and publisher have taken care in the preparation of this book, but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for incidental or consequential damages in connection with or arising out of the use of the information or programs contained herein. Sun Microsystems, Inc., has intellectual property rights relating to implementations of the technology described in this publication. In particular, and without limitation, these intellectual property rights may include one or more U.S. patents, foreign patents, or pending applications. Sun, Sun Microsystems, the Sun logo, J2ME, J2EE, Solaris, Java, Javadoc, Java Card, NetBeans, and all Sun and Java based trademarks and logos are trademarks or registered trademarks of Sun Microsystems, Inc., in the United States and other countries. UNIX is a registered trademark in the United States and other countries, exclusively licensed through X/Open Company, Ltd. THIS PUBLICATION IS PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. THIS PUBLICATION COULD INCLUDE TECHNICAL INACCURACIES OR TYPOGRAPHICAL ERRORS. CHANGES ARE PERIODICALLY ADDED TO THE INFORMATION HEREIN; THESE CHANGES WILL BE INCORPORATED IN NEW EDI- TIONS OF THE PUBLICATION.
[Show full text]
Commands with the Answers
Catonsville Ubuntu-MD Loco Meeting October 22, 2016 1. View the file /var/log/syslog one page at a time a. cat /var/log/syslog |more 2. Declare variables for /var/log/syslog and /etc/logrotate.conf a. SYSLOG=”/var/log/syslog” b. LOGROTATE=”/etc/logrotate.conf” 3. View the first 5 lines of /var/log/syslog using the declared variable a. head -n5 $SYSLOG 4. View a live view of the last 5 lines of /var/log/syslog using the declared variable a. tail -n5 -f $SYSLOG 5. Search for all instances of the words log and rotate in /etc/logrotate.conf using the declared variable a. grep –Ew ‘log|rotate’ $LOGROTATE 6. Count all instances of the word log or rotate in /etc/logrotate.conf using the declared variable a. grep –Ewc ‘log|rotate’ $LOGROTATE 7. Count all instances of blank lines in /etc/logrotate.conf using the declared variable a. grep –c ‘^$’ $LOGROTATE 8. Count all the words in /etc/logrotate.conf using the declared variable a. cat $LOGROTATE | wc -w 9. Create a new group account… student a. groupadd student 10. Create a new standard user account… student1, primary group is student a. useradd –gstudent student1 11. Create a new privileged user account… instructor a. useradd –Gsudo instructor 12. Create a new directories called projects, assignments, quizzes, tests in /data a. mkdir –p /data/{projects,assignments,quizzes,tests} 13. Assign all files created in quizzes and tests directories with the group instructor a. chmod g+s /data/{quizzes,tests} 14. Create new files called assignment_1.txt thru assignment_9.txt in the home directory a.
[Show full text]
Linux Shell Scripting Cookbook Second Edition
Linux Shell Scripting Cookbook Second Edition Over 110 practical recipes to solve real-world shell problems, guaranteed to make you wonder how you ever lived without them Shantanu Tushar Sarath Lakshman BIRMINGHAM - MUMBAI Linux Shell Scripting Cookbook Second Edition Copyright © 2013 Packt Publishing All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews. Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the authors, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book. Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information. First published: January 2011 Second edition: May 2013 Production Reference: 1140513 Published by Packt Publishing Ltd. Livery Place 35 Livery Street Birmingham B3 2PB, UK. ISBN 978-1-78216-274-2 www.packtpub.com Cover Image by Parag Kadam ([email protected]) Credits Authors Project Coordinator Shantanu Tushar Shiksha Chaturvedi Sarath Lakshman Proofreader Reviewers Linda Morris Rajeshwari K. John C. Kennedy Indexer Hemangini Bari Anil Kumar Sudhendu Kumar Production Coordinator Aravind SV Shantanu Zagade Acquisition Editor Cover Work Kartikey Pandey Shantanu Zagade Lead Technical Editor Ankita Shashi Technical Editors Jalasha D'costa Amit Ramadas Lubna Shaikh About the Authors Shantanu Tushar is an advanced GNU/Linux user since his college days.
[Show full text]
Bash Guide for Beginners
Bash Guide for Beginners Machtelt Garrels Xalasys.com <tille wants no spam _at_ xalasys dot com> Version 1.8 Last updated 20060315 Edition Bash Guide for Beginners Table of Contents Introduction.........................................................................................................................................................1 1. Why this guide?...................................................................................................................................1 2. Who should read this book?.................................................................................................................1 3. New versions, translations and availability.........................................................................................2 4. Revision History..................................................................................................................................2 5. Contributions.......................................................................................................................................3 6. Feedback..............................................................................................................................................3 7. Copyright information.........................................................................................................................3 8. What do you need?...............................................................................................................................4 9. Conventions used in this
[Show full text]
Linux Command Cheat Sheet
Linux commands cheat sheet Basic navigation Command Purpose Examples cd change working directory cd .. Change to parent directory cd /course/cs017 Change to /course/cs017 cd - Change to previous directory cd ~/course Change to /home/YOUR_USERNAME/course cd ~dap/pub Change to /home/dap/pub ls list files in a directory ls list files in current directory ls dir1 list files in dir1 ls -l dir1 show details for each file in dir1 ls -a dir1 show all files (even hidden files) pwd print the current working directory©s name People Command Purpose Examples floor see who©s logged in where floor ta print a map of who©s logged into TA areas finger find out about a person finger dap snoop find out about a person snoop dap anyone find your friends logged in anyone Add logins, 1 per line to your ~/.anyone zwrite send a message to a person zwrite dap su switch to user Don©t use this. Use sux. sux switch to user (can use graphical apps) sux ± dap Switch to user ©dap© Permissions Command Purpose Examples chgrp change the group which owns a file chgrp GROUP file Change group of ©file© to GROUP chmod change the user who owns a file chmod MODE file Change mode of ©file© to MODE umask change your umask umask MODE Change default umask to MODE Use "man <command>" for more details [email protected] Page 1/2 Linux commands cheat sheet Specific file types Command Purpose Command Purpose acroread Views pdf files gzip/gunzip Gzip compression xpdf Views pdf files zip/unzip Windows-compatible compression xdvi Views dvi files gv Views postscript files (.ps) Miscellaneous
[Show full text]