C2110 UNIX and programming Lesson 5 -1C2110
UNIX and programming
Petr Kulhanek
kulhanek@chemi.muni.cz
National Center for Biomolecular Research, Faculty of Science
Masaryk University, Kamenice 5, CZ-62500 Brno
Lesson 5
PS / 2020 Distance form of teaching: Rev3
C2110 UNIX and programming Lesson 5 -2Summary
L1-L4
➢Linux is a multi-user operating system which allows simultaneous
work of several users who can be logged in locally or remotely
➢It supports work in both CLI and GUI.
➢Supports Kerberos authentication.
➢Linux has native support for remote launch of applications with
graphical output (GUI)*
➢Linux has support for running virtual machines, it can therefore
run instances of MS Windows operating system
➢The system is very well documented (commands, etc.)
• export of display using X11 forwarding
(C2115)
• or via VNC (preferred method)
C2110 UNIX and programming Lesson 5 -3Summary
L1-L4
➢Linux uses hierarchical file system which is case sensitive in names
of files and directories. Slash is used to separate directories and
files.
➢Access to files and directories can be controlled with access rights
at a relatively rough level. However, it is sufficient for normal work.*
* allocated to C2115
C2110 UNIX and programming Lesson 5 -4Summary
L1-L4
➢Program is a binary file executed directly by the processor.
➢To run a program, simply specify its name if the program exists in
the directory specified by PATH variable. Otherwise, the program
name must be specified, including the path.
➢Process is an instance of a running program. The operating system
uses multitasking to run several processes simultaneously on
several processors.
➢Each process can use three streams to communicate with the
environment. The user can manipulate these streams. Streams
can be redirected or connected.
C2110 UNIX and programming Lesson 5 -5Continuous
test I (L1-L3)
➢ Test via ROPOT in IS (Revision, Opinion Poll, Testing)
Student - ROPOT - C2110
• Test I (regular student)
• Test Is (students with special needs)
Only one set of questions can be compiled at a time
• from 11. 1. 0:00 to 12. 1. 23:59
Test contains 20 questions. Standard time to complete the test is 20 minutes. A
question can have any number of correct answers. Only answers are
evaluated. The correct answer is +1 point. The wrong choice is -0.25 points.
The final score is a simple sum of all points.
It is allowed and recommended:
• Use terminals. I recommend to open terminals before starting the test.
• Some questions cannot be answered correctly without online access to
the WOLF cluster at the time of the test.
• Search manual pages, your notes and presentations.
• Use the internet, search engines.
We expect you to fill the test separately.
C2110 UNIX and programming Lesson 5 -6-
Flowchart
You create a flowchart of the algorithm for one of the offered tasks in January 24, 2021
11:59 PM.
Details: L5.M2
C2110 UNIX and programming Lesson 5 -7Next
Subject
➢ Basics of programming
➢ Bash
C2110 UNIX and programming Lesson 5 -8-
Content
➢ Programs vs Scripts
• compiled vs interpreted languages, examples
➢ Basics of programming
• algorithmization, algorithm, notation of algorithms, data
structures, operations, input/output operations
➢ Bash
• interactive vs non-interactive mode, direct and indirect
execution of scripts