C2110 UNIX and programming Lesson 11 -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 11
PS / 2020 Distance form of teaching: Rev4
C2110 UNIX and programming Lesson 11 -2Summary
L10
➢ AWK
C2110 UNIX and programming Lesson 11 -3Process
of Executing the Script
C2110 UNIX and programming Lesson 11 -4AWK
Scripts
$ awk –f script.awk input.txt
awk script
analyzed text file
result is printed on the screen
language interpreter
Indirect start:
Direct launch is possible, but I do not recommend using it.
AWK does not support interactive mode.
Special variables:
$0 whole record
$1, $2, $3 ... individual record fields
$i record field specified by variable "i"
NF number of fields in the current record (Number of Fields)
NR order of current record (Number of Records)
Output:
unformatted: print item1[[,] [item2]…]
formatted: printf("format",…)
C2110 UNIX and programming Lesson 11 -5Test
II (L1-L7)
➢ Test via ROPOT in IS
Student - ROPOT - C2110
• Test II (regular student)
• Test IIs (students with specific needs)
It is possible to compile only one set of questions at a time
• from 25. 11. 0:00 to 26. 1. 23:59
The test contains 20 questions. The standard time to complete the test is 20
minutes. The question can have any number of correct answers.The 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 opening terminals before starting 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 presentation subject.
• Use the internet, search engines.
We expect you to complete the test separately.
C2110 UNIX and programming Lesson 11 -6Next
Subject
➢ Practicing
C2110 UNIX and programming Lesson 11 -7-
Obsah
➢ Bash + AWK + Gnuplot
• Practicing
• Practical examples of scripts for the exam