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#+TITLE: Introduction to Operating Systems and Networks

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The course consists of two parts dealing with operating systems and
networks.  The goal of the course is to offer an overview of these
topics.  The course is designed for 21 two-hour classes, including at
least 4 laboratory assignments. A written test may be planned after
the first part of the course (operating systems) and another one at
the end.

The course and the slides are in French.

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The materials of this course are distributed under the [[https://en.wikipedia.org/wiki/Creative_Commons_license][Creative
Commons Attribution Alone licence]].

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* CM 1. Operating systems, networks, virtualisation
  This part introduces basic ideas used in the domains discussed in
  the course. The slides are available [[file:../content/courses/os-upec/systemes-reseaux-cm01.pdf][here]].

* CM 2. Linux: directory structure and command line
  This part lists the directories from [[http://en.wikipedia.org/wiki/Filesystem%2520Hierarchy%2520Standard][Filesystem Hierarchy Standard]]
  and explains them. Some basic file management commands are then
  given and explained. The slides are available [[file:../content/courses/os-upec/systemes-reseaux-cm02.pdf][here]].

* TP 1. Lab assignment 1: the command line
  The goal of this assignment is to introduce students to the Linux
  command line and also to the usual ways of finding information about
  available commands and applications. The text of the assignment is
  [[file:../content/courses/os-upec/systemes-reseaux-tp01.pdf][here]].

* CM 3. Rights, links, transformations, search
  This part deals with three subjects which are very important in
  managing a UNIX-type system: file access rights, symlinks and
  hardlinks, and transformations. We will a "transformation" a command
  that works well in command chains built using pipes. This part of
  the course lists a couple useful transformations (e.g., =head=,
  =cut=, =xargs=) and finishes by explaining two very often used
  search commands: =grep= and =find=. The slides are available [[file:../content/courses/os-upec/systemes-reseaux-cm03.pdf][here]].

  Directory permissions work a bit differently from permissions for
  regular files. This section does not cover this difference, but
  interested students are invited to take a look at [[http://www.hackinglinuxexposed.com/articles/20030424.html][this article]].

* TP 2. Lab assignment 2: the command line 2
  This assignment suggests a number of advanced use cases of the
  command line and has the goal to help students consolidate the
  practical skills in redirection of streams, pipes, and usage of
  transformations. The text of the assignment can be found [[file:../content/courses/os-upec/systemes-reseaux-tp02.pdf][here]].

* CM 4. Shell scripts
  This section provides a quick overview of the shell scripting
  language as a full-fledged programming language. Some basic elements
  such as variables, arrays, control structures, and functions are
  covered. Several situations are covered in which the code is
  evaluated in unintuitive ways. The slides are [[file:../content/courses/os-upec/systemes-reseaux-cm04.pdf][here]].

* TP 3. Lab assignment 3: shell scripts
  This assignment considers several typical server administration
  tasks, like system monitoring, backup, or local messaging, and
  proposes to automate them. The students are also invited to
  reimplement a number of basic tools, including a simplified version
  of =xargs=. The text of the assignment can be found [[file:../content/courses/os-upec/systemes-reseaux-tp03.pdf][here]].


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* CM 5. The OSI model
  This section discusses the OSI model: the detailed formal
  specification of the organisation of the network stack. An overview
  of every layer is provided; the network and the transported layers
  are presented in some more detail. A short list of well-known
  network protocols concludes the presentation. The slides are
  available [[file:../content/courses/os-upec/systemes-reseaux-cm05.pdf][here]].

* CM 6. Network commands
  This section briefly introduces some basic concepts behind the
  Domain Name System, and particularly the hierarchy of domain names
  and DNS servers. Several useful network commands are then listed,
  including =ifconfig= and =netcat=. The slides are available [[file:../content/courses/os-upec/systemes-reseaux-cm06.pdf][here]].

* TP 4. Lab assignment 4: network commands
  This lab assignment proposes a couple scenarios in which the network
  commands shown in the preceding section of the course are
  applied. This assignment focusses in particular upon =scp=, =wget=,
  and =nc=. The text of the assignment can be found [[file:../content/courses/os-upec/systemes-reseaux-tp04.pdf][here]].

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* Course project: a basic network chat
  This course project proposes to apply the skills acquired in basic
  system administration and networking to implement a primitive text
  chatting system. The text of the assignment can be downloaded [[file:../content/courses/os-upec/systemes-reseaux-projet.pdf][here]].


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