/LinuxScripting

Primary LanguagePython

Linux Scripting course

This is a group of exercises that were done during a course on Basic Linux Scripting, along with the slides for the course (in Hebrew).

The course focused on three scripting languages and tools: Bash, AWK and Python. Each subject was accompanied by various exercises. Finally, at the end of the course, a final project with parts of each scripting language was assembled. The PDF file for the project is in Hebrew.

For this course I received a 99/100.

Below are notes on the exercises that you may find in the subdirectories.

Bash: (slides 193-195)

  • Ex 6 double.sh [number]
    • Trivial. No input checks
  • Ex 7 home.sh [user]
    • Cuts /etc/passwd to home folders, greps argument, uniques
    • No input checks
  • Ex 8 clock.sh
    • Parses date using tr/cut/sed and a function
  • Ex 9 just_3.sh [arg1] [arg2] [arg3]
    • Checks the presence of three arguments
  • Ex 11
    • histogram.sh [filename]
      • Prints the histogram without array,
      • contains utility function to print n times.
    • histogram_array.sh [filename]
      • Prints the histogram with array,
      • contains utility function to print n times.
  • Ex 12 histogram12.sh [filename] [from] [to]
    • Same as previous but combined with/out array, and with range. Include input check
  • Ex 13 where.sh [program path]
    • For each folder in path, checks if command exists there and if +x.
    • Non-recursive, as we were instructed.
  • Ex 14 count.sh
    • Displays args starting with ¨-¨ and not starting with ¨-¨

Awk:

  1. teams_script.awk, written after slide 230
    • Here we implement the bonus of computing the global average,
    • by using the by-player sum of grades
    • Can be run using teams_script.sh
  2. brackets.awk, does indentation of curly brackets (one per line) and indicates if brackets missing, as it happens regarding missing opening.
    • Can be run using brackets.sh [file to indent], no input check

Python:

  1. kafot.py, fully simulates the game, uses input for number of people,
    • very simple implementation
    • kafotalg.py includes the mathematical solution as well as the reasoning.
    • Can be run using kafot.py
  2. mastermind.py:
    1. creates the array of string from 0001 to 9999,
    2. starts the loop that:
      1. prints a number and asks for bullseyes/hits,
      2. calls a function that iterates over the array and
        1. checks if the number is at all possible by computing the bullseyes/hits and comparing to the user-provided values),
        2. removes the numbers that do not match.
    • Can be run using mastermind.py

Project:

  • config.sh
    • environment file, according to the instrutor, should be run before mailer.py
  • create_user.sh [username]
    • Trivial
  • list_users.sh
    • See comment there
  • send_message
    • Trivial
  • transport_agent.sh (runs transport_agent.awk)
    • Using a state machine as instructed.
    • States: 0=user, 1=date, 2=line number, 3=message
    • We added inbox and inbox_index, as allowed, to the AWK file,
    • which allows us to not rely on hardcoded paths
  • set_status [num] [status]
    • Trivial
  • mailer.py
    • Relies on config.sh
    • Input-based menu
      • We are reading the entire file to an array of Dictionaries
      • Each time we change the file we update the array in te memory by calling bindData()