28. You are starting a new year and need to create ten empty files for your accounting system. Which of the commands or operators enable you to quickly create these files?

To quickly create ten empty files, you can use the touch command with curly braces and a sequence expression. For example:

touch file_{1..10}.txt

This will create ten files with names "file_1.txt", "file_2.txt", and so on, up to "file_10.txt". The touch command updates the last modified date of the file, so by creating an empty file with touch, you are essentially creating a new file.

Another option is to use a for loop in the bash shell. For example:

for i in {1..10}; do touch file_$i.txt; done

This will create the same ten files as the previous example. The for loop iterates over the sequence of numbers from 1 to 10, and for each iteration, it runs the touch command to create a new file with a unique name.