Save yourself time when performing complex repetitive tasks. You’ll begin this course by refreshing your knowledge of common command-line programs and arguments before quickly moving into the world of Bash scripting. You’ll create simple command-line pipelines and then transform these into Bash scripts. You’ll then boost your skills and learn about standard streams and feeding arguments to your Bash scripts.

Introduction and refresher

Extracting scores with shell

Searching a book with shell

Your first Bash script

A simple Bash script

Shell pipelines to Bash scripts

Extract and edit using Bash scripts

Standard streams & arguments

Using arguments in Bash scripts

Using arguments with HR data

From Command-Line to Bash Script

Master the bread and butter of Bash scripts—variables! In this chapter, you’ll learn how to create basic string and numeric variables, and perform calculations on these variables. You’ll also learn about the magic of a shell-within-a-shell (shell-ception), opening up huge opportunities for advanced scripting.

Basic variables in Bash

Using variables in Bash

Shell within a shell

Numeric variables in Bash

Converting Fahrenheit to Celsius

Extracting data from files

Arrays in Bash

Creating an array

Creating associative arrays

Climate calculations in Bash

Variables in Bash Scripting

Life isn't always linear and neither should your Bash scripts. In this chapter, you’ll take your Bash scripts to the next level by learning control statements. You’ll learn the differences between FOR, WHILE, IF, and CASE statements and how to use them in your Bash scripts. Armed with these new tools, you’ll be ready to create more advanced Bash scripts with conditional logic. 

IF statements

Sorting model results

Moving relevant files

FOR loops & WHILE statements

A simple FOR loop

Correcting a WHILE statement

Cleaning up a directory

CASE statements

Days of the week with CASE

Moving model results with CASE

Finishing a CASE statement

Control Statements in Bash Scripting

Give your Bash scripts a powerful new addition by building useful functions to process data and variables. In this last chapter, you will learn the structure of functions in Bash, how to use functions to help automate frequent tasks, and program your scripts to run on schedule without needing to even lift a finger.

Fungsi dasar di Bash

# Create function
____ upload_to_cloud () ____
  # Loop through files with glob expansion
  for file in output_dir/____results____
  do
    # Echo that they are being uploaded
    ____ "Uploading $file to cloud"
  done
____

# Call the function
upload_to_cloud


# Create function
function upload_to_cloud () {
  # Loop through files with glob expansion
  for file in output_dir/*results*
  do
    # Echo that they are being uploaded
    echo "Uploading $file to cloud"
  done
}

# Call the function
upload_to_cloud


Mengunggah hasil model ke cloud

# Create function
_____ _____ {

  # Parse the results of date
  ____=$(date | cut -d " " -f1)

  # Echo the result
  echo ____
}

# Call the function
____


# Create function
what_day_is_it () {

  # Parse the results of date
  current_day=$(date | cut -d " " -f1)

  # Echo the result
  echo $current_day
}

# Call the function
what_day_is_it


Dapatkan hari saat ini

Argumen, nilai kembalian, dan ruang lingkup

# Create a function 
____ return_percentage () ____

  # Calculate the percentage using bc
  percent=$(echo "scale=2; 100 * ____ / ____" | ____)

  # Return the calculated percentage
  echo $____
}

# Call the function with 456 and 632 and echo the result
return_test=$(____ ____ 632)
echo "456 out of 632 as a percent is $____%"


# Create a function 
function return_percentage () {

  # Calculate the percentage using bc
  percent=$(echo "scale=2; 100 * $1 / $2" | bc)

  # Return the calculated percentage
  echo $percent
}

# Call the function with 456 and 632 and echo the result
return_test=$(return_percentage 456 632)
echo "456 out of 632 as a percent is $return_test%"


Kalkulator persentase

# Create a function
____ get_number_wins () ____

  # Filter aggregate results by argument
  ____=$(cat soccer_scores.csv | cut -d "," -f2 | egrep -v 'Winner'| sort | uniq -c | egrep "____")

____

# Call the function with specified argument
____ "____"

# Print out the global variable
echo "The aggregated stats are: ____"


# Create a function
function get_number_wins () {

  # Filter aggregate results by argument
  win_stats=$(cat soccer_scores.csv | cut -d "," -f2 | egrep -v 'Winner'| sort | uniq -c | egrep "$1")

}

# Call the function with specified argument
get_number_wins "Etar"

# Print out the global variable
echo "The aggregated stats are: $win_stats"


Fungsi analitik olahraga

# Create a function with a local base variable
function sum_array () {
  ____ sum=0
  # Loop through, adding to base variable
  for number in "$____"
  do
    sum=$(echo "$sum + $____" | bc)
  done
  # Echo back the result
  echo $____
  }
# Call function with array
test_array=(14 12 23.5 16 19.34)
total=$(sum_array "${____[@]}")
echo "The total sum of the test array is $____"


# Create a function with a local base variable
function sum_array () {
  local sum=0
  # Loop through, adding to base variable
  for number in "$@"
  do
    sum=$(echo "$sum + $number" | bc)
  done
  # Echo back the result
  echo $sum
  }
# Call function with array
test_array=(14 12 23.5 16 19.34)
total=$(sum_array "${test_array[@]}")
echo "The total sum of the test array is $total"


Menjumlahkan sebuah array

Menjadwalkan skrip Anda dengan Cron

Menganalisis jadwal crontab

Membuat cronjob

Menjadwalkan cronjob dengan crontab

Terima kasih dan penutup

Functions and Automation

New Hires

Soccer Scores

Hire Data

Model Results

Rob's Files

Model Output

Inherited Folder

Bash adalah bahasa scripting yang ringkas, sangat cepat, dan andal untuk manipulasi data serta berkas. Ini merupakan keterampilan penting untuk membangun pipeline analitik di cloud, dan menjadi pilihan para pengguna Linux untuk mengelola data yang tersimpan di berbagai berkas.

Dalam kursus ini, kami akan memandu Anda melalui dasar-dasar Bash scripting. Kita mulai dengan pengenalan struktur skrip Bash, termasuk memasukkan argumen dan menghasilkan keluaran. Anda kemudian akan mempelajari struktur data seperti variabel dan array, serta pernyataan kendali seperti loop dan kondisional. Selanjutnya, Anda akan mempraktikkan yang telah dipelajari dengan membuat fungsi Bash Anda sendiri dan menjadwalkan skrip otomatis agar berjalan tepat waktu dengan cron.

Introduction to Shell

Pelajari cara menggunakan skrip Bash untuk otomatisasi, membuat pipeline analitik, dan mengelola data.

Pengantar Bash Scripting

Pemrograman Bash memungkinkan Anda untuk membangun pipa analitik di cloud dan bekerja dengan data yang disimpan di berbagai file.

Menjadwalkan skrip Anda dengan Cron

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