SHELL SCRIPTING
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Shell Scripting Online Training Course Content
UNIX and Linux Basics
- UNIX Operating System
- UNIX evolution
- UNIX and Linux influencers
- flavors of UNIX
- Why UNIX?
- UNIX and Linux features
UNIX shell basics
- Shell hierarchy
- Types of Shells
- Know about Shell
- Login Shell
- Why Use Shell Script?
Shell commands
- Variables and strings
- Math in Shell
- Shell commands
Customizing Environment
- How to Setup Environment?
- Environment variables
- The history command options
- Shortcuts : Defining alias
- Utility scripting
- Scoping with export
Shell Programming
- Program structure
- Shell variables
- Quotes – Strings
- Shell Output
- Print formatted data
- Continuing Lines
- Exit Status
- Logic using test
- Expressions
Script Controls
- Shell script if control
- Switching with case
- while: Looping
- for: Looping with a List
- break and continue in loops
- trap: Interrupting a program
- Debugging Shell Scripts
- Exercise
Shell functions
- Function
- Shell and sub-shell
- Array in shell
- File system
- What’s in a (File) name?
- The Parent-Child Relationship
- The HOME Variable: The Home Directory
- Current Directory
- cd: Changing the Current Directory
- mkdir: Making Directories
- rmdir: Removing Directories
- Absolute Pathnames
- Relative Pathnames
- ls: Listing Directory Contents
- The cat options
- Compare files
- Compress files
The UNIX File System
- Security
- File permissions
- Ownership and permissions
- Common permission with umask
- Groups and users
- Switch user
- Symlink, hard links
Regular Expressions
- Regular Expression Overview
- RE Character Classes
- RE Quantifiers
- RE Parenthesis
- RE Examples with grep
- Re in awk
- RE in sed
System Resources
- Disk size df
- Diskspace utilization du
- RAM space with top
- Swap space free
- CPU uptime
Network
- telnet and ftp
- Communication check : finger
- Remote files : scp, rcp, rsync
- Download from command wget
- Upload from command curl
- Email alerts
- Remote script : ssh
- Password less connectivity
INTRODUCTION TO awk
- Introduction and command line syntax
- The awk program structure
- Operators
- Simple patterns
- Extended patterns
- Special patterns (BEGIN and END)
- Program variables: Built-in variables, User defined variables,Arrays
- Mathematical operators
- Displaying output with print and printf
- Exercises: Create awk scripts to extract selected data from a file and generate reports
awk PROGRAM CONTROL STRUCTURES
- Program control structures
- The if construct
- The while and do … while constructs
- The basic for construct
- Associative array handling
- Functions: Mathematical and string functions, The system function, The getline function, User defined functions
- Exercises: Create an awk script using an program control structures and arrays
awk DEBUGGING AWK SCRIPTS
- Responding to Syntax errors
- Responding to Logical errors
- Exercises: Using tools within a shell script