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Essentials of Linux Administration

The course is aimed at existing IT professionals with little or no UNIX/Linux experience, who require a quick start in a Linux environment, enabling them to control a Linux system swiftly, efficiently and with full understanding of the underlying principles.

Typical candidates would be current users of  Windows, Mac OS, or other professionals (such as software developers, system or network administrators) who need to gain a solid understanding of the environment of LInux, and facilities provided by it.
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Learning Objectives

Delegates will learn how to

    Work with Linux main shell:BASH
    Navigate the filesystem and manage files and directories
    Understand the client/server nature of X Window System and X applications
    Edit files using vi and GUI editors
    Manipulate data with a selection of filter tools
    Use redirection and piping techniques
    Perform basic administrative tasks, controlling processes, filesystems, job scheduling, and simple networking and backups
    Reading and writing simple BASH scripts

Pre-Requisites

Typically, delegate skills will include a good working knowledge of other contemporary operating system, and familiarity with working at the command line. This course is aimed at existing IT professionals with little UNIX or Linux experience, who require a quick start in a Linux environment, enabling them to control a Linux system swiftly and efficiently.

Whilst no particular Linux knowledge is expected, without a doubt the best results are achieved if the delegates have experienced the system they will be expected to use or administer.

Course Content

Many institutions have been adding Linux machines to their existing infrastructure: perhaps to give developers a platform of their choice, to provide an alternative to a network server, or perhaps to introduce an additional piece to the security jigsaw.

Linux systems are also being introduced as part of virtualisation environments (for example, with the use of VMware or XEN, KVM or VPC), allowing access to a mixture of operating systems from a single workstation or server. This course will give the delegates the skill set preparing them for a successful future with Linux technology, by discussing a hybrid of topics that span user and administrator tasks and activities.


Exam Notice

Please notice that LPI exams are not included in the course. Before attempting the LPI examination, the delegates are encouraged to follow this course with the advanced administration training and then consolidate their knowledge in a real life working environment.


Typical Course Outline

1. “Just For Fun”

    Linux? Why?
    Hardware, software, operating system...
    UNIX Market and place for Linux within it
    OSS (Open Source Software) principles
    GNU GPL, Linux philosophy and distributors
    Linux for networking and developers
    LPI – Linux Professional Institute
    LPIC certification
    Introduction to objectives and coverage

2. Linux Session

    Gaining access to the system
    Ordinary users vs. the superuser
    Login process, shells and line interpreters
    Command line structure, control and examples
    Simple system interrogation utilities
    Simple file reading utilities
    File system layout and navigation
    System and user directories
    Using filenames with absolute and relative pathnames
    Getting help

3. Using Files and Directories

    File system – the user’s perspective
    Directory structure
    FSH standard
    File and directory manipulation commands
    Copy, move, remove, etc
    File system – the system’s perspective
    I-nodes and file attributes
    Hard links and symbolic links

4. Editing Text

    Operational modes of vi
    Command mode vs. Insert mode
    “Colon”, or “ex” mode
    Useful vi commands
    Navigation and editing command
    Search and substitute
    Extended vi commands and vim configuration
    Alternative editors
    GUI and text choices

5. BASH – Your Interpreter

    Shell as Interpreter and command line scan
    Generating filenames with wildcards (globbing)
    Quoting (protecting special characters from the shell)
    Variable and command substitutions
    Protecting special characters for the shell
    Bash Command History
    Bash Command Line Editing

6. BASH  Environment

    Shell definitions
    Creating, recalling and sharing shell variables
    Shell aliases and functions
    Character sets and localisation
    Bash variables to control these
    Controlling shell behaviour with set -o and shopt
    Interactive Start-up Files
    Start-up files for login and non-login shells

7. Who is the Boss

    The su command
    su interactive session
    Running one-off commands
    Checking who you are
    Understanding id and who am i tools
    The sudo tool
    Typical sudo session
    sudo configuration file

8. Processes

    What is a Process?
    How a process starts
    How a process ends
    The kill command and signals
    Command exit status
    Identifying Processes
    ps, top and GUI process monitors

9. Job Control

    Background jobs
    One-off deferral with at
    Daemon and job manipulation
    User access configuration files
    Spool directory
    Scheduling repeated tasks with crontab
    The cron daemon and configuration tables
    User access configuration files

10. Data Streams

    Standard data streams
    Standard output stream (stdout)
    Standard error stream (stderr)
    Standard input (stdin)
    Redirecting streams
    Redirecting standard output, error and input
    Synchronising (merging) streams
    Other methods of handling data streams
    Collecting data with sub-shells
    Using command substitution

11. Pipes and Filters

    Sending stdout to a process
    Pipes
    Multistage Pipes
    Simple Filters
    Why Use Filters?
    Problem Solving Approach
    The cut, sort, uniq, grep and tr commands
    Filter Examples

12. Basic Regular Expressions (and SED)

    Regular expressions
    What is sed
    Specifying simple instructions
    Understanding sed addressing
    Using a sed command file
    More sed editing commands

13. File Management Tools

    Using PATH to identify command origins
    The which and type commands
    Locating files
    The locate command and mlocate database
    Identifying filenames with find
    Specifying search criteria and requesting actions
    Backups with cpio, and dd and tar
    Compression tools

14. Filesystem Access

    Files, directories and filesystems
    File and directory access
    Read/write/execute permissions
    User types
    Additional permission bits
    Set user/group ID bits and sticky bit
    Using chmod, chown and chgrp to manipulate access attributes

15. Working in a Network Environment

    Basic network card configuration
    Using ifconfig tool
    GUI configuration programs exist
    Basic routing configuration
    Using route commands
    Network diagnostics
    With ping, traceroute and netstat
    Using ssh for remote shell logins

16. X Window System

    X Window System as Linux GUI Interface
    Origins and implementation
    X Window System Architecture
    Client-server communication
    Setting display access  rights
    Selecting destination display
    Window managers / desktop systems
    Gnome, KDE and more…
    X Window resources
    Fonts, colours, geometry

17. Writing Shell Scripts

    Simple scripts
    Positional parameters
    Command exit status
    Selection commands
    Looping commands
    Interactive input

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