UNIX/LINUX SHELL SCRIPTING

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Shell Scripting Training  Faculty : Real-time experience

Methodology:

Lucidtechsystems Manage risk and reduce compliance costs with end-to-end processes for compliance, governance, and risk. Class discussion, class assignments, A/V presentation, real-life experience, classroom exercises, and self-study.

Highlights In Our SHELL SCRIPTING Training Service:

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Also,see PYTHON training and PERL training courses.

UNIX course content is exclusively designed with Basics through Advanced commands.

UNIX/LINUX (Basics + Advanced) + Shell Scripting

Introduction to the Unix Operating System

  • A brief history of Unix
  • The Unix kernel
  • The UNIX file system
  • Getting started navigating the file system
  • The file system structure
  • Directories and files
  • Pathnames
  • Navigating the file system
  • Exercise: Logging on to the system
  • Exercise: Navigating the file system

 Unix Basic Commands

  • Command line syntax
  • Basic file handling commands
  • Directory handling commands
  • Filename wildcard characters
  • Exercise: Manipulating files and directories

Redirection and Pipes

  • Input redirection
  • Output redirection
  • Pipes
  • Exercise: Using redirection and pipe facilities

 Introduction to The vi Editor

  • Overview of the vi editor
  • Basic functions
  • Switching to input mode
  • Other useful commands
  • Exercises: Using the vi editor
  • Exercise: Using more advanced vi features

 Searching and Replacing Text

  • Replacing text
  • Using the vi editor
  • Using sed for search and replace
  • Searching for text with grep
  • Linking files
  • Exercises: Searching and Replacing Text

 Recalling and Editing Commands

  • Overview
  • The bash shell
  • The Korn shell
  • Exercises: Recall and Edit Commands

 File Permissions and Access Control

  • Users and user groups
  • File access permissions
  • Changing file attributes
  • Switching users and user groups
  • Linking files
  • Exercise: Setting and access permissions

 Processes

  • What is a process?
  • Monitoring processes
  • Killing processes
  • Background processes
  • Job Control
  • Grouping commands
  • Exercise: Monitoring and controlling processes

 More Basic Commands

  • The WC (word count) command
  • The find command
  • The cut command
  • The sort command
  • The finger command
  • Exercise: Using file handling commands

 The User Environment

  • Customising the .profile or .bash_profile
  • Customising the .kshrc or .bashrc
  • Exercise: Setting up an environment

Shell Scripting Training

Unix Command Review

  • Basic Unix commands
  • General commands
  • File and directory handling commands
  • Filename generation characters
  • I/O Redirection features
  • Other commands

Getting Started

  • What is a shell script?
  • Development guidelines
  • Creating and editing shell scripts
  • Naming and storing shell scripts
  • Executing shell scripts
  • Exercise: Write a simple shell script

 Using Variables

  • Environment variables
  • Local variables
  • Assigning values to variables
  • Assessing variable values
  • Using quotes
  • Delimiting variable names
  • Echo control sequences
  • Exercise: Add variables to a script

Integer Arithmetic

  • Using the expr command
  • Using the (( )) notation
  • Exercise: Add integer arithmetic to a shell script

 Handling Run-Time Data

  • The read command
  • Command line arguments
  • Exercise: Writing a generic shell script
  • Exercise: Writing an interactive shell script

 Condition Execution

  • The if statement
  • The test command
  • Other test notations
  • Default and substitute variables
  • Exit status codes
  • Exercise: Adding validation to previous scripts

 Loop Constructs

  • The while loop
  • The until loop
  • The for loop
  • The while true and until false loops
  • Loop control commands
  • Exercise: Enhancing the previously written scripts
  • Exercise: Writing a guess-the-number game

Multi-Branch Decisions

  • The case statement
  • Menu drove applications
  • Exercise: Developing and writing a menu system

Functions

  • What is a function?
  • Syntax
  • Examples
  • Exercise: Add a function to a script

Interrupt Handling

  • Interrupt signals
  • Trapping interrupts
  • Exercise: Adding traps to the menu script

Additional Features and Facilities

  • The exec commands
  • The includes notation
  • More about loops
  • Arrays
  • Here Documents
  • Exercise: Create a here script

Unix Advanced Shell Programming

Redirection, Pipes, and Filters

  • Standard I/O and redirection
  • Pipes
  • Command separation
  • Conditional execution
  • Grouping Commands
  • UNIX filters
  • The tee command

Backup and Restore Utilities

  • Archive devices
  • The cpio command
  • The tar command
  • The dd command

Background Job Scheduling

  • Starting background jobs
  • Background tasks and the nohup command
  • Process priorities and the nice command
  • Job control
  • Scheduling jobs with the at command
  • Scheduling jobs with the cron command

Regular Expression Notation

  • Regular expressions
  • Extended regular expressions

 Searching Files for Patterns

  • The grep family of commands
  • The grep command
  • The fgrep command
  • The egrep command

 The Stream Editor – sed

  • Introduction and command line syntax
  • The sed program structure
  • sed program processing
  • Use sed commands
  • sed addresses
  • sed instructions
  • Hold and get functions
  • Advanced flow control

Commands for Comparing Files

  • Compare two files with the cmp command
  • Compare two files with the comm command
  • Compare two files with the diff and sdiff commands
  • Compare large files with the bdiff command

File Manipulation Commands

  • The file command
  • The head command
  • The tail command
  • The cut command
  • The paste command
  • The pr command
  • The split and csplit commands

 Identify and Translate Characters

  • od – octal dump
  • Use cat to display non-printing characters
  • The expand and unexpand commands
  • The tr command

Sorting Files

  • The sort command
  • Specify sort keys with -k
  • Sort by column positions
  • The uniq command

 Introduction to the Pattern Scanning Utility – awk

  • Introduction and command line syntax
  • The awk program structure
  • Use regular expressions
  • Operators
  • Simple patterns
  • Extended patterns
  • Comments
  • Special patterns (BEGIN and END)
  • Program variables
  • Built-in variables
  • User defined variables
  • Mathematical operators
  • Enhanced printing
  • Handling user variables

 awk Program Control Structures

  • Program control structures
  • The if construct
  • The while and do … while constructs
  • The basic for construct
  • Associative array handling
  • Functions
  • Built-in functions
  • The system function
  • The get line function
  • User defined functions

Examples of Shell Scripts

  • Logic Development:
  • Shell script to print given numbers sum of all digit
  • Shell script to print contains file from given line number to next given number of lines
  • Shell script to say Good morning/Afternoon/Evening as you log into system=
  • Shell script to find whether entered year is Leap or not
  • Sort the given five number in ascending order (use of array)
  • Command line (args) handling:
  • Adding 2 nos. supplied as command line args
  • Calculating average of given numbers on command line args
  • Finding out biggest number from given three nos supplied as command line args
  • Shell script to implement get outs statement.
  • Basic math Calculator (case statement)
  • Loops using while & for loop:
  • Print nos. as 5,4,3,2,1 using while loop
  • Printing the patterns using for loop.
  • Arithmetic in shell scripting:
  • Performing real number calculation in shell script
  • Converting decimal number to hexadecimal number
  • Calculating factorial of given number
  • File handling:
  • Shell script to determine whether given file exist or not.
  • Screen handling/echo command with escape sequence code:
  • Shell script to print “Hello World” message, in Bold, Blink effect, and in different colors like red, brown etc.
  • Background process implementation:
  • Digital clock using shell script
  • User interface and Functions in shell script:
  • Shell script to implements menu based system.
  • System Administration:
  • Getting more information about your working environment through shell script
  • Shell script to gathered useful system information such as CPU, disks, Ram and your environment etc.
  • Shell script to add DNS Entry to BIND Database with default Nameservers, Mail Servers (MX) and host
  • Integrating awk script with shell script:
  • Script to convert file names from UPPERCASE to lowercase file names or vice versa.

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