The shell is both a language and a program whose detailed behavior will be presented to you here so you can become proficient in its programming. This course will enable you to acquire real autonomy in writing shell scripts in concrete application domains (surveillance, automation, installing software, file processing, etc.). You’ll be able to validate your skills with AVIT® certification, offered as an option.
The shell is both a language and a program whose detailed behavior will be presented to you here so you can become proficient in its programming. This course will enable you to acquire real autonomy in writing shell scripts in concrete application domains (surveillance, automation, installing software, file processing, etc.). You’ll be able to validate your skills with AVIT® certification, offered as an option.
Developers, technicians, and Unix/Linux administrators.
Basic knowledge of a Linux/Unix system and programming. Experience desirable in the use of one of these systems.
Overview of the UNIX Shell
- History of the UNIX Shell. UNIX fork/exec system calls.
- Arguments and environment of a UNIX program.
- How the Shell reads the command line.
- Differences between Bourne, Korn and Bourne Again Shells.
Interfacing UNIX with the interactive Shell
- Starting an interactive Shell. Initialization of the Shell.
- Line editing, vi and emacs Ksh modes. Line editing with Bash.
- Name completion. Shell options and the set built-in.
- Customizing the environment. The command search path.
- Shell commands and scripts.
- Sourcing Shell commands. Execution of a Shell script. UNIX execution of a Shell script, the she-bang.
- Creation and use of Shell variables. Passing arguments to a Shell script.
- Differences between exec, background and sub-shells. Using pipelines and lists.
An introduction to Shell scripting
- Basic Shell programming.
- Shell variables and compound variables. Strings operators.
- Command substitution, braces expansion, tilde substitution.
- Initialization of a script, positional parameters, shift and parameters substitution.
- Flow Control.
- If/else, for, case, select, while and until. Functions. The set and eval built-ins.
Advanced Shell programming and the Korn Shell
- Typed variables. Arrays, indexed and associative arrays. Typeset, indirect variable references.
- Input/Output. I/O redirections, the IFS. Reading from the standard input.
- Process handling. Job control signals and traps. Co-routines and co-process
substitution de process.
- Optimization of the Korn Shell. Function libraries. Development of new Shell built-in
- Korn Shell debugging. Special debug traps. Using setters and getters.
Other UNIX powerful scripting tools
- Frequently used tools associated with the Shell.
- Shar, stty, lockfile, tput, grep, find, cut, sort and xargs
AST tree walk and coshell.
UNIX regular expressions.
- Analysing text with SED. The command line. Scripting with sed.
- Overview of the AWK interpreter. Internal variables.
- Text and database processing.
If registering for the AVIT® Automating Administration With Windows PowerShell certification option, you must do so at the same time as course registration. The exam is a multiple-choice test lasting one-and-a-half to two hours. The result indicates your skill level. Merely taking the course is not sufficient to achieve a maximum score. The exam must be both scheduled and then taken online within 4 weeks following the start of your session.
Different exercises (simple and complex) will be carried out in order to become truly autonomous in writing shell scripts.
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