Shell scripting is associated with the use of a variety of ‘shells’ such as the ‘Bourne Shell’ developed by Stephen Bourne, also of Bell Labs, the ‘Korn Shell’ developed by David Korn, again while at Bell Labs and other widely used shells such as the ubiquitous ‘BASH’ shell (Bourne Again SHell) included with virtually every open source operating system such as Linux, OpenBSD, FreeBSD and some closed source ones. Shell scripting has, to some degree, more recently come to be associated with ‘batch/cmd file’ programming in Windows environments.

Shell script is a script that is interpreted by the shell. For example, Windows has its shell that has it’s code, Unix systems have Bourne shell, C shell, etc. Shell script is set of commands with variuos options. Whatever you want to write in shell script is possible in perl but the only difference is it’s easy to maintain and write perl scripts then shell.

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Unix-Shell Scripting

Shell Scripting

History of UNIX Features of UNIX Flavors of UNIX Comparison of UNIX with Windows Architecture of UNIX UNIX File System Different types of Files Regular Files Directory Files Device Files Basic Commands pwd, logname, who, finger Exit, date, cal Creating Users & Groups groupadd, groupdel useradd, userdel System startup & Shutdown Init, halt, shutdown Different Run levels Different date formats Working with files cat, touch, rm cp, mv Working with Directories mkdir, cd, rmdir, rm –r Standard Input & Output Redirecting output Redirecting Input Comparing Files cmp, diff, comm Searching files find, locate, which Zip files gzip, gunzip Displaying files ls, ls options Viewing long files pg, more, head, tail File Permissions chmod, chown, chgrp, umask Meta/Wild Card-characters Class, Anchors Repetition, Alteration Group, Dot Regular Expressions & Patterns What is pattern Usage of regular expression Different types of pattern Character pattern Word pattern Line pattern Tools for Filters grep, grep with options Flat files What are delimiters and its types? Reading and Writing to files Tools for column data cut, paste  Tools for sorting Sort by lines, Sort by fields Sort with options, uniq Changing information in files tr, sed Piping usage of piping piping with filters tee command Communication Tools write, wall mail, mail with options Networking protocols telnet, ftp Disk status du,  df with options Job control Foreground jobs, background jobs Killing jobs, nohup Process status ps , ps with options Editor Vi 3 modes Command mode Insert mode Ex command mode  For demo class call us at : 9290971883 or 040-64559566 Mail id : revanthonlinetraining@gmail.com For more details please visit http://www.revanthtechnologies.com/shell-scripting-online-training-from-india.php

What is shell scripting? Importance of shell scripting Different types of shells Creating shell script Making shell scripting executable Shell input & output echo, print, read Backslash character constants Variables What is variable System defined variables Environment files User defined variables Constant variables Local & global variables Special variables Operators Arithmetic variables Relational numeric operators Logical operators Assignment operators Conditional statements if, if….else if, elif case Looping while, until, for break, continue File test commands String test commands exit & sleep commands Command line arguments Usage of COA What is $0, S#, $*, $@, $? , $$ Job scheduling cron at batch Compiling and execution of C and C++ programs