AUDIENCE:   Experienced programmers and support staff, who have some experience of UNIX or Linux based systems, and who will be implementing further applications and systems. The course is suitable for delegates wishing to use the Korn, Bourne and BASH shell on all versions of UNIX and Linux. (e.g. AIX, Solaris, HPUX, Red Hat etc.). PREREQUISITES:   Attendees should have a good basic understanding of UNIX or Linux, ideally gained through our Essentials course. Knowledge of a standard UNIX/Linux editor (e.g. vi) will be required. DURATION:   3 days. Hands on. OBJECTIVES:   The course is highly interactive and consists of theory with plenty of hands on practical content. This course will provide programmers and UNIX/Linux Support Staff with the skills necessary to construct extensive Shell scripts. By the end of the course, delegates will be able to confidently put together and maintain complex shell scripts. COURSE CONTENT:   UNIX & Linux Review Major Components The filesystem Listing Directories Creating Files Displaying Files Moving Around Directories Redirection Piping Searching for a Pattern (grep) Finding Files User Security Other Useful Commands The Shell Environment Shell Variables Exporting variables System Variables The Back Quote The Single Quote The Double Quotes The Backslash Special Escape Characters Recalling Previous Commands Modifying Previous Commands Shell Programming Shell Scripts Executing Shell Scripts Passing Arguments To A Program Positional Parameters Special Shell Parameters The Shift Command Read Command Expr Command Korn Shell Arithmetic Miscellaneous Commands New Group Cut and Paste Comparing Files Head and tail Touching files Grouping Commands Shell Constructs Typeset Here Documents Korn Shell Functions Conditional Processing Logical Constructs Basic Structured Conditionals Nesting Structured Conditionals ELIF Statement The Test Command formats String Operators Integer Operators File Operators Logical Operators Case Statement Conditional Looping The For Command For Statement Without Word List The While Command The Until Command While True Command Until False Command The Break Command The Continue Command Additional Programming Topics Shell Script Comments The Exit Command The Sleep Command The Wait Command The Set Command The Unset Command Special Variable Constructs The Null Command Signals used by Shell Procedures Interrupt handling Trace Timing Command getopts command Korn Shell Arrays Random Variable Korn Shell Menu System Programming Hints Creating Efficient Shell Procedures eval The Stream Editor The Stream Editor Searching and Replacing Text Deleting lines Printing Lines Edit Files The Awk Utility The awk utility Operators BEGIN and END Arithmetic operators Use of awk within a shell script GN08/01