Shell Scripting Weekend batch starting 17th Dec 2011

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.

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 pipesVariables
• 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 commandDecision 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
FunctionsSome 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 ExtenstionsA few words on - Restricted shell, Trojan hourses and setuid/gid scripts
Q & A