• Challenge 1 : Using the awk command, print the first column of a comma-separated values (CSV) file.

• Challenge 2: Use awk to print the second field of a file separated by ":".

• Challenge 3: Use awk to find the average of the numbers in the fourth column of a file called "numbers.txt", and print the result to the terminal.

• By default, awk uses whitespace as the field separator when processing input data. If your data is delimited by a different character, such as a comma or a semicolon, you need to specify the appropriate field separator using the -F option. For example, to process a CSV file, you should use the command awk -F',' '{print $1}' file.csv to extract the first field of each record. Make sure to specify the appropriate field separator to correctly process your data.

• Not understanding the difference between print and printf: awk has two ways to output text: print and printf. print outputs a newline character at the end of each record, while printf does not. printf allows you to format the output using C-style formatting codes, such as %s for strings and %d for integers. Make sure to use the appropriate command depending on the output you need. If you need to output text with a newline at the end of each record, use print. If you need to format the output, use printf.

Bash scripts related to every session of this tutorial will be stored in isolated branches named after their session name.

You can access the main code and the challenge answer key related to every session at their own branch.