SUMMARY:   Students will learn to read, write, and debug shell scripts, thus increasing productivity by taking full advantage of the bash shell. AUDIENCE:   Linux or UNIX users, programmers, and system administrators. PREREQUISITES:   Fundamentals of UNIX or Fundamentals of Linux DURATION:   3 Days COURSE CONTENT:   UNIX Processes What is a Process? Process Structure The ps Utility Options to the ps Utility Background Commands (&) Killing Background Processes Redirecting the Standard Error Getting Started What is a Shell? Running Scripts Specifying the Script's Interpreter The PATH Environment Variable Sub-shells Variables Shell Variables The read Command The export Command The Shell Environment Parameter Expansion Command Substitution The Login Process The Login Process The System Profile Script Your .bash_profile Script The . Command Conditional Statements The Exit Status of Commands Command Line Examples The test Command The if-then-else Construct The elif Construct case Statements Loops The for Loop The while Loop break and continue Reading Lines From Files Using Arrays with Loops Special Variables $$ - PID of Shell Command-Line Arguments $# - Number of Arguments $* - All Arguments The shift Command The set Command Getting Options Quoting Mechanisms Single vs. Double Quotes What is a Here Document? Using a Here Document Here Document Quoting Ignoring Leading Tabs Functions Shell Functions Passing Arguments to Functions Returning Values from Functions Function Declarations Advanced Programming Shell Arithmetic The select Statement Terminal Independence in Scripts The eval Command Debugging Techniques Using echo Using Standard Error Script Tracing Options for Debugging Conditional Debugging 4/2003/CJ