Shell Scripting

BASH Shell Scripting and UNIX utilities

Day 1

Background and Introduction to SHELL
# What is shell
# Differnt Types of Shell, How to invoke a Shell, Which Shell we using.
# Why use Shell scripts
Getting Started
# A Simple Script and standard first line
# Building Blocks of a shell Script - Commands and Arguments, Variables, I/O Redirection, Decisions and Looping
# Execution Tracking - Simple Debugging
Text manipulation - Strings and Files
# Searching text - grep command family
# Regular Expressions - powerful string manipulation tool/language
# BRE - Basic Regular Expression
# ERE - Extended Regular Expression
# Streams Editor - sed
Some test exercises

Day 2

Text Manipulation - Fields and Records
# Using ",cut",
# Using ",join",
# Text manipulation using awk - basics
More Text Processing tools
# Data sorting
# Use of unix utilities - sort, uniq, wc, fmt, head and tail
What are pipes
Variables
# Understanding Variables and Shell Environment
# Exporting variables to environment and setting variables readonly
# Parameter Expansion
# Expansion Operators
# POSIX Operators
# Positional parameters
# Special Variables
# Arithmetic Expansion
Some test exercises

Day 3

Exit status and exit command
Decision making
# ",if-elif-else-fi",
# Logical NOT, AND and OR
# ",test", command and test expression
# ",case", statement
Looping
# ",for", loops
# ",while", and ",until", loops
# ",break", and ",continue",
# ",shift", and option processing
Functions
Some test exercises

Day 4

Input/Output, Files and Command Evaluation
# standard input, output and error
# Reading lines - ",read", command
# Redirections, redirectional operators and file descriptors
# Tilde and wildcard filename expansions
# Command substitution, Quoting, Evaluation order, Shell built in commands
Working with Files
# Understanding filesystems, Directories and files
# Finding files - ",find",
# Making use of ",xargs",
# Useful Filesystem and file comparison utilities
Processes
# Understanding UNIX processes
# Creation and listing of processes
# Controlling and Deletion of Process
# Trapping process signals
# Note on Process Accounting
# Process scheduling - ",at", and ",cron",
# /proc filesystem
BASH Shell - common Extenstions
A few words on - Restricted shell, Trojan hourses and setuid/gid scripts
Q & A

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Day 1

Background and Introduction to SHELL
What is shell
Differnt Types of Shell, How to invoke a Shell, Which Shell we using.
Why use Shell scripts
Getting Started
A Simple Script and standard first line
Building Blocks of a shell Script - Commands and Arguments, Variables, I/O Redirection, Decisions and Looping
Execution Tracking - Simple Debugging
Text manipulation - Strings and Files
Searching text - grep command family
Regular Expressions - powerful string manipulation tool/language
BRE - Basic Regular Expression
ERE - Extended Regular Expression
Streams Editor - sed
Some test exercises

Day 2

Text Manipulation - Fields and Records
Using ",cut",
Using ",join",
Text manipulation using awk - basics
More Text Processing tools
Data sorting
Use of unix utilities - sort, uniq, wc, fmt, head and tail
What are pipes
Variables
Understanding Variables and Shell Environment
Exporting variables to environment and setting variables readonly
Parameter Expansion
Expansion Operators
POSIX Operators
Positional parameters
Special Variables
Arithmetic Expansion
Some test exercises

Day 3

Exit status and exit command
Decision making
",if-elif-else-fi",
Logical NOT, AND and OR
",test", command and test expression
",case", statement
Looping
",for", loops
",while", and ",until", loops
",break", and ",continue",
",shift", and option processing
Functions
Some test exercises

Day 4

Input/Output, Files and Command Evaluation
standard input, output and error
Reading lines - ",read", command
Redirections, redirectional operators and file descriptors
Tilde and wildcard filename expansions
Command substitution, Quoting, Evaluation order, Shell built in commands
Working with Files
Understanding filesystems, Directories and files
Finding files - ",find",
Making use of ",xargs",
Useful Filesystem and file comparison utilities
Processes
Understanding UNIX processes
Creation and listing of processes
Controlling and Deletion of Process
Trapping process signals
Note on Process Accounting
Process scheduling - ",at", and ",cron",
/proc filesystem
BASH Shell - common Extenstions
A few words on - Restricted shell, Trojan hourses and setuid/gid scripts

Q & A

BASH Shell Scripting and UNIX utilities

Shell scripting is one of the most used programming languages by System Administrators and Database Administrators. Its used to automate many routine SA and DBA tasks. For any System and Database administrator, knowledge of shell scripting is a added advantage. At Ahana we have a shell scripting course based on BASH and our tutors themselves were SA’,s and DBA’,s and have a very good knowledge.
What we cover

Day 1

Background and Introduction to SHELL
* What is shell
* Differnt Types of Shell, How to invoke a Shell, Which Shell we using.
* Why use Shell scripts
Getting Started
* A Simple Script and standard first line
* Building Blocks of a shell Script - Commands and Arguments, Variables, I/O Redirection, Decisions and Looping
* Execution Tracking - Simple Debugging
Text manipulation - Strings and Files
* Searching text - grep command family
* Regular Expressions - powerful string manipulation tool/language
* BRE - Basic Regular Expression
* ERE - Extended Regular Expression
* Streams Editor - sed
Some test exercises

Day 2

Text Manipulation - Fields and Records
* Using ",cut",
* Using ",join",
* Text manipulation using awk - basics
More Text Processing tools
* Data sorting
* Use of unix utilities - sort, uniq, wc, fmt, head and tail
What are pipes
Variables
* Understanding Variables and Shell Environment
* Exporting variables to environment and setting variables readonly
* Parameter Expansion
* Expansion Operators
* POSIX Operators
* Positional parameters
* Special Variables
* Arithmetic Expansion
Some test exercises

Day 3

Exit status and exit command
Decision making
* ",if-elif-else-fi",
* Logical NOT, AND and OR
* ",test", command and test expression
* ",case", statement
Looping
* ",for", loops
* ",while", and ",until", loops
* ",break", and ",continue",
* ",shift", and option processing
Functions
Some test exercises

Day 4

Input/Output, Files and Command Evaluation
* standard input, output and error
* Reading lines - ",read", command
* Redirections, redirectional operators and file descriptors
* Tilde and wildcard filename expansions
* Command substitution, Quoting, Evaluation order, Shell built in commands
Working with Files
* Understanding filesystems, Directories and files
* Finding files - ",find",
* Making use of ",xargs",
* Useful Filesystem and file comparison utilities
Processes
* Understanding UNIX processes
* Creation and listing of processes
* Controlling and Deletion of Process
* Trapping process signals
* Note on Process Accounting
* Process scheduling - ",at", and ",cron",
* /proc filesystem
BASH Shell - common Extenstions
A few words on - Restricted shell, Trojan hourses and setuid/gid scripts
Q & A

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