Shell Script Online Training
Shell Script Introduction Objectives Course Schedule Course Introductions Pre-requisites Bibliography Delegate Responsibilities Course Summary
Shell Script Review of Basics – optional Files Directories and Processes Displaying Directories – ls Getting Help – man Displaying Files – cat, more Simple Commands Piping – using | symbol Redirection – using > symbol Redirection – using >> symbol Redirecting Input – using < symbol Redirecting Errors
Shell Script Shell Programming: Shell Scripting Online Training Creating Shell Scripts Testing the Command Creating the Script File Adding Execute Permissions Testing the Script Running the Script – time Running the Script – dot Running the Script – exec Running the Script – ksh Debugging the Script
Shell Script ď&#x201A;&#x2014; If you have ever opened a book on programming, you
would immediately recognize this as the traditional "Hello World" program. Save your file with some descriptive name. How about my_script? ď&#x201A;&#x2014; The first line of the script is important. This is a
special clue given to the shell indicating what program is used to interpret the script. In this case, it is /bin/bash. Other scripting languages such as perl, awk, tcl, Tk, and python can also use this mechanism.
Shell Script A shell script is a text file that contains a sequence of commands for a UNIX-based operating system. It's called a shell script because it combines into a "script" in a single file a sequence of commands that would otherwise have to be presented to the system from a keyboard one at a time.
Shell Script
Shell Script Creating Menus Conditions – case Creating a Menu Iteration – while, until Holding the Output – sleep Holding the Output – dummy read Ending the Script Ending the Loop Hidden Option – forking a shell Trapping Interrupts – trap
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