Ppt on shell scripting basics

1 Introduction to Perl. 2 What is Perl? Practical Extraction and Report Language A scripting language which is both relatively simple to learn and yet.

bin/perl -w which must start from column 1 on line 1. 11 Basic Syntax All Perl statements end in a semicolon ; (like C) In Perl, comments begin with # (like shell scripts) –everything after the # to the end of the line is ignored. /bhecker@acm.org. Please send me $); –Useful for strings full of quotes. 28 Backquotes: Command Substitution You can use command substitution in Perl like in shell scripts: $ whoami bhecker #!/usr/bin/perl -w $user = `whoami`; chomp($user); $num = `who | wc -l`; chomp($num); print /


Shell Scripting Introduction. Agenda What is Shell Scripting? Why use Shell Scripting? Writing and Running a Shell Script Basic Commands -ECHO - REM.

Shell Scripting Introduction Agenda What is Shell Scripting? Why use Shell Scripting? Writing and Running a Shell Script Basic Commands - @ -ECHO - REM - TITLE - COLOR - PAUSE Shell Scripting are text files of CLI commands must have the CMD or / printed report Create menus and interactive programs to simply the UI Shell scripting is an essential skill of all Windows users to solve programming problems and improve efficiency of the OS Basic Shell Commands ECHO turns system prompt output on or off and displays/


Tool Building 1: Shell CS 360 tool1. Page 2 tools1 CS 360, WSU Vancouver What is Systems Programming? (again) hardware drivers OS services system programs.

.:/home/langd/bin:/net/class/cs360/bin:/usr/bin % ls -l my-program -rwxrwxr-x~~~~~~~~~~my-program % vi my-script % chmod +x my-script (" whence foo " = where foo will be found) Page 21 tools1 CS 360, WSU Vancouver Use the Shell Utility Toolkit Basic line oriented processing: 4 grepfind patterns 4 sededit lines 4 cutextract columns 4 sortsort lines into specified order 4 uniqdisplay/


Chapter 8: The Bourne Again Shell It’s a command interpreter, it’s a programming language, and it makes a mean martini.

aforementioned startup files They do however inherit the calling shell’s environmental variables marked for export So basically anything you set for the login shell is set for the noninteractive shell Working with Startup Files In the end, these startup files are just shell scripts Obey the same rules and conventions that scripts must use for the particular shell you’re using Most important files are probably.bashrc/


1 Introduction to Perl. 2 What is Perl? Practical Extraction and Report Language A scripting language which is both relatively simple to learn and yet.

bin/perl -w which must start from column 1 on line 1. 11 Basic Syntax All Perl statements end in a semicolon ; (like C) In Perl, comments begin with # (like shell scripts) –everything after the # to the end of the line is ignored. /bhecker@acm.org. Please send me $); –Useful for strings full of quotes. 28 Backquotes: Command Substitution You can use command substitution in Perl like in shell scripts: $ whoami bhecker #!/usr/bin/perl -w $user = `whoami`; chomp($user); $num = `who | wc -l`; chomp($num); print /


Introduction to z/OS Basics © 2006 IBM Corporation Chapter 4: Interactive facilities of z/OS: TSO/E, ISPF, and UNIX 58.

to z/OS and use a limited set of basic commands. This is sometimes called using TSO in its native mode.  ISPF  Provides a menu system for accessing many of the most commonly used z/OS functions.  z/OS UNIX shell and utilities  Allows users to write and invoke shell scripts and utilities, and use the shell programming language. Chapter 04 TSO, ISPF, USS © 2006/


Chapter 15 Introductory Bourne Shell Programming.

problem at hand Copyright © 2005 Pearson Addison-Wesley. All rights reserved. Program Control Flow Commands Used to determine the sequence in which statements in a shell script execute The three basic types of statements for controlling flow of a script are: –Two-way branching –Multiway branching –Repetitive execution of one or more commands Copyright © 2005 Pearson Addison-Wesley. All rights reserved. Program Control Flow/


1 CSE 391 Lecture 5 Intro to shell scripting slides created by Marty Stepp, modified by Jessica Miller & Ruth Anderson

.washington.edu/391/ 2 Lecture summary basic script syntax and running scripts shell variables and types control statements: the for loop 3 Shell scripts script: A short program meant to perform a targeted task.  a series of commands combined into one executable file shell script: A script that is executed by a command-line shell.  bash (like most shells) has syntax for writing script programs  if your script becomes > ~100-150 lines, switch to/


Introduction to Unix Shell & Scripting with csh/tcsh  Brief Unix History  Unix Shell & Flavor  CSH/TCSH Scripts.

the script with different shell other than your interactive shell Run the script with different shell other than your interactive shell Ex: willow>sh test Invoking a Shell script  Put special characters on the first line of a shell script To tell/types of expansion‘ ‘ suppress all types of expansion escaping the following special character escaping the following special character Basic Script Example willow> more basic_script #!/bin/tcsh echo Listing the files in long format appending due date/time echo ls/


Bourne Shell1-1 Borne Shell  Background m Early Unix shell that was written by Steve Bourne of AT&T Bell Lab. m Basic shell provided with many commercial.

by Steve Bourne of AT&T Bell Lab. m Basic shell provided with many commercial versions of UNIX m Many system shell scripts are written to run under Bourne Shell m A long and successful history Bourne Shell1-2 Bourne Shell Programming  Control structures m if … then m/ than or equal to -eqEqual to -neNot euqal to -leLess than or equal to -ltLess than Bourne Shell1-6 Exercise  Create a shell script to check there is at least one parameter m Something like this: … if test $# -eq 0 then echo “ you must supply /


Linux presentation A basic introduction.

files. The execute permission grants the ability to execute a file. This permission must be set for executable programs, including shell scripts, in order to allow the operating system to run them. When set for a directory, this permission grants the ability /knowing Vi is essential. Known Linux applications (II) Text editors nano nano is a small and friendly text editor. Besides basic text editing, nano offers many extra features like an interactive search and replace, go to line and column number. Known /


Unix/Linux basics 0010 Operating systems lab Gergely Windisch uni-obuda.hu room 4.12.

Unix/Linux basics 0010 Operating systems lab Gergely Windisch windisch.gergely@nik. uni-obuda.hu room 4.12 unix filesystems (1) Unix supports many /identified easily. Solution to Exercise 8 #!/bin/bash newfile="~/uptime" date >> $newfile uptime >>$newfile echo "----------------" >>$newfile echo " " >>$newfile Exercise 9 Write a shell script that takes two input parameters from the user, and then creates a symbolic link pointing to the file denoted by the first parameter with the name provided as the /


Week Eleven Agenda Announcements Open Source Presentation dates April 4 and 11 Lab Assignment 11-1 No script logic Link of the week Review week ten lab.

/password file Location: /etc/passwd Field separators: Colon (:) File format: Username:Password:UID:GID:UserID:Home directory:Command/shell Example: dandrear:x:1020:1021:dandrear user:/export/home/dandrear:/bin/ksh Permissions on Einstein: -rw-r--r-- 1 /process with pid 8074 to be “killed” Review week ten lab assignment /etc/rc.d/rc.sysinit This init script performs basic system configuration which includes setting the system clock, hostname, and keyboard mapping; setting up the swap partitions; checking the/


Windows Administration How to automate Windows MSDN: “Windows Script Host (WSH) is a Windows Administration Tool.”

Language comparison For users that used Visual Basic or VBA and JScript for HTML pages writing WSH scripts shouldn‘t be any problem Visual Basic vs. WSH and JScript vs. JavaScript Visual Basic programs can be compiled into EXE files/ statement WSH – UI - Output Echo, MsgBox for output. MsgBox prompt, buttons, title Popup method var WshShell = WScript.CreateObject("WScript.Shell"); var result; result = WshShell.Popup( Message, 0, Title, vbOKCancel + vbInformation); WSH – UI - Input Getting user input using/


Shells. A program that is an interface between a user at a terminal and the computers resouces ▫The terminal may be real or an emulator The shell is.

: no spaces!  Note: no $ is needed to assign  Case sensitive Use by putting $ in front ▫ $myvar Example: ▫ #ext=.sh #name=doit #compname=$name$ext #echo $compname doit.sh Scripts Intro Shells can execute groups of commands in a file ▫Scripts Script basics ▫They have basic control sequences  e.g. conditionals and looping  if, for, while ▫They may contain commands ▫They must have execute permission Using the/


Review of Fundamentals 1.  The CST8207 course notes  GPL  the shell  SSH (secure shell)  the Course Linux Server  RTFM  vi  general shell review.

for it to read  Normally we are asking the shell to run programs for us on certain arguments, which we also type  This is the command line  Basically, the process is this 1.The shell prints a prompt on our terminal or terminal emulator screen /have trouble with any of the above! 16 Commands, programs, scripts, etc. Command A directive to the shell typed at the prompt. It could be a utility, a program, a built-in, or a shell script. Program A file containing a sequence of executable instructions. Note /


CMPE 473-Internet Programming GROOVY SCRIPTING LANGUAGE Presented by Seçkin ULUĞ Canan Çelik.

Set binding object for passing the parameters to methods Use evaluate method of shell to run the script Use evaluate method of shell to run the script GroovyShell Approach(Example) import groovy.lang.Binding; import groovy.lang.GroovyShell; public/println it.id + " -- ${it.firstName} ${it.lastName} --"} ); Web Development Groovylet is basically the counterpart of a Servlet in Java Groovylet is basically the counterpart of a Servlet in Java Alternative to servlet Alternative to servlet Same with Servlet as /


BASH Scripting Intro and Variables. Objectives Introduce Unix script writing including: – introducing variables – locality – basic I/O Introduce script.

script writing including: – introducing variables – locality – basic I/O Introduce script execution Introduce the.bash_profile file Overview Executing Variables – creating/assignment – accessing – list variables (arrays) – exporting – read only – eliminating – predefined I/O – read – echo (write) Example of First Script -bash-3.2$cat helloworld # show contents of script/ the shell is called. Shell Positional Parameters VariableResult $0params $1 $2a b $#3 $@a b c $?0 $*a b c $$13061 Assuming a script called /


1 UNIX essentials (hands-on) the directory tree running programs the shell → command line processing → special characters → command types → shell variables.

ls I.* ls I.04? ls I.0[123]* ls I.0[^123]* echo I.0[^123]* 11 Shell Scripts → a text file, a sequence of shell commands → the character can be used for line continuation (for readability) for that purpose, it must be /set environment variables source: execute a script within the current shell environment special keystrokes (to use while a process is running) ctrl-c: send an interrupt signal to the process ctrl-z: send a suspend signal to the process 13 More Shell Commands: basic flow control → commands: if, /


The Bourne Shell CS465 - UNIX. Bourne Shell The Bourne shell was the first widely used UNIX shell. It is: –the most common –the easiest to learn –used.

Here is a “hello world” shell script: $ ls –lF h* -rwxr-xr-x 1 smith 48 Feb 19 11:50 hello* $ cat hello #!/bin/sh # comment lines start with # character echo "Hello world" $ hello Hello world $ Variable Names The shell provides for variable creation and usage. There are basically two general categories of variables in UNIX: –Shell Variables (Assigned by the Shell) –User-Created Variables (Assigned/


Shell Programming. 222 Lecture Overview  Shell variables  Shell scripts  Control flow and Boolean operators  Shell programming tips  Shell programming.

Overview  Shell variables  Shell scripts  Control flow and Boolean operators  Shell programming tips  Shell programming examples 333 Shell Variables  Unlike simpler operating systems (such as DOS), UNIX shells provide powerful programming languages  Each shell has a different language  We will only learn C Shell programming: A powerful programming language Its syntax is similar to that of the C language 444 Shell Variables  Like in any programming language, the most basic elements/


Lecture 2: Advanced UNIX, shell scripts (ol)‏ Programming Tools And Environments.

to the concept of a shell, effective use of the shell, the shell as programming language, and shell scripts. We will use the bash shell for the examples and details provided. Shell syntax and commands history and command completion job control variables programming constructs scripts What does the shell do? Executes commands Supports scripting (is a programming language)‏ Startup files Shell Variables strings use assignment dereference Example Shell Variables sh / ksh / bash/


Introduction to shell programming using bash Deniz Savas and Michael Griffiths November 2005 Corporate Information and Computing Services The University.

Email M.Griffiths@sheffield.ac.uk D.Savas@sheffield.ac.uk Introduction Why use shell programs Basics of shell programming Using variables and parameters User Input during shell script execution Arithmetical operations on shell variables Aliases Debugging shell scripts References Presentation Outline Introduction What is the shell? Why write shell programs? Types of shell What is the shell? Provides an Interface to the UNIX Operating System It is a command interpreter –Built/


Lecture 2: Advanced UNIX, shell scripts Programming Tools And Environments.

$1 $2 echo $* C-d # Control-D is the end of file character. $ chmod +x xx  The file xx is now an executable shell script. Scripts and Parameters (cont)‏ $ xx a b c./xx 3 a b a b c $ xx./xx 0 Unspecified parameters expand as empty strings (I.e..,/ as nothing)‏ Loops for, while and until The for loop is a little bit different from other programming languages. Basically, it lets you iterate over a series of words within a string. The while executes a piece of code if the control expression is/


Week Eleven Agenda Announcements Open Source Presentation dates July 26 and August 2. Lab Assignment 11-1 Knoppix File System - No script logic Link of.

/password file Location: /etc/passwd Field separators: Colon (:) File format: Username:Password:UID:GID:UserID:Home directory:Command/shell Example: dandrear:x:1020:1021:dandrear user:/export/home/dandrear:/bin/ksh Permissions on Einstein: -rw-r--r-- 1 /process with pid 8074 to be “killed” Review week ten lab assignment /etc/rc.d/rc.sysinit This init script performs basic system configuration which includes setting the system clock, hostname, and keyboard mapping; setting up the swap partitions; checking the/


Introduction to Linux Linux startup process Unix Shells and scripts.

Shells Common shells: shbourne shell cshc shell kshkorn shell bashbourne again shell tcshtc shell zshz shell Perferred shell for linux users is bash. Perferred shell for BSD users is tcsh. To change your default shell, use the chsh command. Shell scripts Normally, shells scripts are run with the bourne shell as this shell exists in all unixes. The first line of a shell script is which shell the script is going to be run by. #!/bin/sh After that, they are basically shell/


More Shell Basics CS465 - Unix. Unix shells User’s default shell - specified in /etc/passwd file To show which shell you are currently using: $ echo $SHELL.

Shell Basics CS465 - Unix Unix shells User’s default shell - specified in /etc/passwd file To show which shell you are currently using: $ echo $SHELL Filename of the shell you are running displays. Example, if running the Bourne shell (sh): $ echo $SHELL /bin/sh $ Subshells Subshells are shells created by a shell –Environment variables are passed Times when subshells are used: –Explicit invocation –Shell script execution –Grouped command execution –Background processing Changing Your Shell/


T UTORIAL OF U NIX C OMMAND & SHELL SCRIPT S 5027 Professor: Dr. Shu-Ching Chen TA: Samira Pouyanfar Spring 2015.

- Type your password - Now, you are connected. 7 L OG IN IN M AC SYSTEMS 8 O UTLINE Log in Unix Basic Commands Shell script 9 C OMMANDS ABOUT F ILES (1) ls : list the contents of your current directory. Format Options -a : list all the/ is a tab) Range N-M N- -M cut [options] [range] filename 26 27 O UTLINE Log in Unix Basic Commands Shell script 28 S HELL SCRIPT INTRO (1) Scripts are collections of commands that are stored in a file. Detail Tutorial http://www.freeos.com/guides/lsst/http://www.freeos.com//


1 Shell Scripting Yao-Yuan Chuang. 2 Outline  What is shell?  Basic  Syntax Lists Functions Command Execution Here Documents Debug  Regular Expression.

-Yuan Chuang 2 Outline  What is shell?  Basic  Syntax Lists Functions Command Execution Here Documents Debug  Regular Expression  Find 3 Why Shell?  The commercial UNIX used Korn Shell  For Linux, the Bash is the default  Why Shell? For routing jobs, such as system administration, without writing programs However, the shell script is not efficient, therefore, can be used for prototyping the ideas  For example, % ls –al | more/


Shell Programming, or Scripting Shirley Moore CPS 5401 Fall 2013 August 29, 2013 1.

– control flow statements if..then..else loops Shell scripts are useful for automating repetitive workflows. Shell scripting is fun! 2 Disadvantages of Shell Scripting Incompatibilities between different platforms Slow execution speed A new process is launched for almost every shell command executed. 3 Learning Objectives After completing this lesson, you should be able to – Explain the basics of Linux shell scripting – Write shell scripts and use them to save time – Customize your/


Unix Linux Administration II Class 7: Scripting conditionals. Setting up your Certificate Authority (CA). Scripting loops.

. Unit 2: Certificate Authority. Unit 3: Scripting loops. Homework review DNS configs. Scripting – ping script. Review: basic math syntax $((expression)) most common functions available including bitwise and logcal White space is optional. non-zero final expression return true. Quoting , ", ` and command subsitution user=$(grep -i $name /etc/passwd) Review: cont. Positional parameters are provided by the shell environment and automatically assign variables to values passed/


Sys. Prog & Scripting - Heriot Watt Univ 1 Systems Programming & Scripting Hans-Wolfgang Loidl Lecture 1: Course Overview.

threads Lecture 14: Distributed object model concepts Lecture 15: Reading on Using C# Remoting Lecture 16: Introduction to scripting, regular expressions Lecture 17: Shell scripting basics: writing a simple script, variables, arithmetic, basic commands, pipes, filters Lecture 18: Control structures, functions in shell scripting Lecture 19: Advanced Shell scripting Sys. Prog & Scripting - Heriot Watt Univ 13 Lecture Plan (contd) Lecture 20: PHP introduction: embedding with HTML, variables and data structures/


1 Bourne Shell Programming l Web Sources l Bourne Shell Tutorials: l l

at most max occurences of the previous regular expression. 4 2 Shell Scripts l Bourne Shell/Korn Shell l Invoking a shell script $shell_script_file or $sh -options shell_script_file n the script file must have execute-permission. l Shell Variables n mydir=/usr/jsmith/bin n count=#assign a null / is received echo $i >> $JUNK$$ i=`expr $i + 1` done 52 More On I/O l The shell permits the combination of the basic I/O constructs with a file descriptor. l A file descriptor (also known as a file handle) is a non-/


Chapter 6: Shell Programming Shell Scripts. Using the UNIX Shell as a Programming Objectives: After studying this lesson, you should be able to: –Learn.

$count + 1` echo $count chmod u+x math.sh math.sh Shell Programming programming features of the UNIX shell:  Shell variables  Operators  Logic structures Shell Logic Structures The four basic logic structures needed for program development are:  Sequential logic  Decision logic/be converted into a low- level (machine) language before the computer can execute it The shell interprets UNIX shell scripts UNIX shell scripts, created with the vi or other editor, contain instructions that do not need to be /


Basic Shell Scripting - Part 1 Objective - Learn to: Read Start-up Files Edit Start-up Files Modify Your User Environment Communicate with Users Write.

to: Read Start-up Files Edit Start-up Files Modify Your User Environment Communicate with Users Write Basic Shell Scripts Create and Use Variables Start-up Files /etc/profile –belongs to root.bash_profile –belongs to user.bashrc/or tabs. For example, if user types hello there in this example var1 would store hello, var2 would store there Input Data into Shell Scripts  WARNING: –It is highly recommended to avoid using variable names that are already reserved for other Unix/Linux commands or utilities. –/


Course materials may not be reproduced in whole or in part without the prior written permission of IBM. 5.1 © Copyright IBM Corporation 2008 Unit 11: Shell.

shell Invoking Shell Scripts (3 of 3) Use the. (dot) or source command to execute the script in your current shell environment. Scripts executed with the dot command can change your current environment. © Copyright IBM Corporation 2008 Invoking Shell Scripts in Another Shell To make sure the shell script always runs in the shell/ not successful) then do (command2) © Copyright IBM Corporation 2008 The structure of the basic if statement is: if statement is true then carry out this set of actions else carry/


1 © 2012 John Urrutia. All rights reserved. Chapter 8 The Bourne Again Shell Halleluiah!

45 © 2012 John Urrutia. All rights reserved. Noninteractive shells So basically anything you set for the login shell is set for the noninteractive shell 46 © 2012 John Urrutia. All rights reserved. Working with Startup Files In the end, these startup files are just shell scripts Obey the same rules and conventions that scripts must use for the particular shell you’re using Most important files are probably.bashrc/


Www.ischool.drexel.edu INFO 320 Server Technology I Week 5 Shell environments and scripting 1INFO 320 week 5.

Shells Linux has several kinds of shells –Korn shell (ksh is the command)Korn shell –Bourne shell (sh or dash, the original UNIX shell)dash Bourne Again SHell (bash, default in Ubuntu)Bourne Again SHell –Z shell (zsh)Z shell –C shell (csh) TCSH shell (tcsh)TCSH shell 5INFO 320 week 5 www.ischool.drexel.edu Shells/ good to comment what your script does, who wrote it, etc. 37INFO 320 week 5 www.ischool.drexel.edu Script basics A script can execute normal commands Output from the script can be –Create or append/


1 © 2000 John Urrutia. All rights reserved. Session 5 The Bourne Shell.

just type the file name as you would a command Alternative (new subshell): sh file Alternative (current shell): file 17 © 2000 John Urrutia. All rights reserved. Shell Script Basics Creating a Shell Script Keyword Shell Variables User Created Variables Readonly Shell Variables 18 © 2000 John Urrutia. All rights reserved. Creating a Shell Script Use a text editor like vi First line should start with #! Followed by the absolute pathname of/


CSE 374 Programming Concepts & Tools Hal Perkins Fall 2014 Lecture 3 – I/O Redirection, Shell Scripts.

Fall 2014 Lecture 3 – I/O Redirection, Shell Scripts News Reminder: HW1 due Thursday night (basic shell commands) Be sure you’re reading the Linux Pocket Guide and looking at Linux man pages – lectures/slides won’t include enough details to understand everything Check the web calendar: slides & sample code/files posted night before most lectures, shell history after –Check out Friday’s slides: extra/


Linux Administration Working with the BASH Shell.

the input and output of a command Identify and manipulate common shell environment variables Create and export new shell variables Edit environment files to create variables upon shell startup 3 Objectives (continued) Describe the purpose and nature of shell scripts Create and execute basic shell scripts Effectively use common decision constructs in shell scripts 4 Command Input and Output BASH shell responsible for: –Providing user interface –Interpreting commands –Manipulating command input/


BASIC BASH SCRIPTING Katherine Holcomb UVACSE. Uses for Scripting Automate repetitive tasks Could also use languages like Perl or Python but it’s still.

BASIC BASH SCRIPTING Katherine Holcomb UVACSE Uses for Scripting Automate repetitive tasks Could also use languages like Perl or Python but it’s still handy to know some bash Write job scripts for the PBS queueing system For most users these must be a shell script (bash, ksh, or tcsh) Anything you can type on the command line can be put into a script Example #!/bin/bash #This/


Introduction to Linux Shell Script Programming Summer course, Institute of Bioinformatics National Yang-Ming University.

Summer course, Institute of Bioinformatics National Yang-Ming University Menu Today!  Part I: Shell Script in Practice Basics about Shell and Exercises of system Shell Scripts Perl Shell Script  Part II: The applications of Shell Script Massive routing jobs Scheduling Backup Shell !? This? or this? First glance — Linux Shell  Why Shell? Computer only realize the command in binary form which is difficult for most of human So OS provides a special program call/


Introduction to Perl Learning Objectives: 1. To introduce the features provided by Perl 2. To learn the basic Syntax & simple Input/Output control in Perl.

from column 1 on line 1. COMP111 Lecture 9 / Slide 7 Basic Syntax (2)  All perl statements end in a semicolon ; (like C++)  In Perl, comments begin with # (like shell scripts)  everything after the # to the end of the line is / are assigned using “ = “ $scalar = expression;  To assign a value to a scalar variable: $number = 25; $name = "Bill Clinton";  Unlike shell scripts, use the “ $ ” both when the variable is used and assigned: $ cat test1 #!/usr/local/bin/perl5 -w $number = 25; $name = "Bill/


CSc 352 Shell Scripts Saumya Debray Dept. of Computer Science

Debray Dept. of Computer Science The University of Arizona, Tucson debray@cs.arizona.edu What is a shell script? A shell script is a list of commands to be run by a shell basically a program, but using shell commands instead of C or Java statements Why? automate repetitious tasks e.g.: testing a program on a large set of test inputs package up commonly executed command/


Shell Scripts 4 A shell usually interprets a single line of input, but we can also create a file containing a number of lines of commands to be interpreted.

+rx 4 Now it can be run from the command line A comment A positional parameter An environment variable Shell Script Basics 4 A shell script consists of a sequence of built-in and nonbuilt-in commands separated by ; or NEWLINE 4 Comments begin with a # 4 Script execution is aborted if a built-in command fails, goes to next command if a nonbuilt-in command/


Shell Scripting Basics Arun Sethuraman. What’s a shell? Command line interpreter for Unix Bourne (sh), Bourne-again (bash), C shell (csh, tcsh), etc Handful.

Shell Scripting Basics Arun Sethuraman What’s a shell? Command line interpreter for Unix Bourne (sh), Bourne-again (bash), C shell (csh, tcsh), etc Handful of commands Text mining made easy! Before we get started Unix/Mac Users: Open a terminal Windows Users: Should have installed VMware Player, and downloaded the virtual machine with Unix pre-loaded on it (else do it now!) VMware Player Basics/ Example 6 – Executing commands in Shell What is BLAST? Write a shell script to: BLAST against all nucleotide BLAST/


Scripting on Linux Origins of scripting languages Learning scripting languages A simple example of a shell script A script with a loop and debugging Processing.

(.BAT) etc. Microsoft froze.BAT language early 1990s. Early versions of MS Basic packaged with MS-DOS, later versions sold separately. Unix opened development and transfer of ideas between shells. * Bourne Shell: /bin/sh* C Shell: /bin/csh * Korn Shell: /bin/ksh* Ash Shell: /bin/ash * GNU Bash Shell: /bin/sh and /bin/bash Unix shell scripts have usual 3 rd G features, including loop constructs, variables, arrays, branches/


Nic Shulver, Scripts and Batch files Scripting in Windows and Linux What is scripting? What is it for? DOS/Windows batch files.

shell scripting Linux Environment Variables Example shell scripts Conclusion Nic Shulver, N.A.Shulver@staffs.ac.uk Scripts and Batch files What is scripting? What is it for? Scripting is an extension of the text-based command-line interface Instead of repetitively typing in a sequence of commands, put them in a file, then just “run” the file with a single command The basic/ Nic Shulver, N.A.Shulver@staffs.ac.uk Scripts and Batch files Example shell scripts #!/bin/Bash # be sure the directory /mnt/


Unix/Linux basics 0011 Operating systems lab Gergely Windisch room 4.12

Unix/Linux basics 0011 Operating systems lab Gergely Windisch windisch.gergely@nik.bmf.hu room 4.12 http://nik.bmf.hu/gwindisch/os_2010 Permissions (quiz/ identified easily. Solution to Exercise 8 #!/bin/bash newfile="~/uptime" date >> $newfile uptime >>$newfile echo "----------------" >>$newfile echo " " >>$newfile Exercise 9 Write a shell script that takes two input parameters from the user, and then creates a symbolic link pointing to the file denoted by the first parameter with the name provided as the /


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