Lately, I have been loving to write shell scripts to automate my workflows and save time instead of coding with Ruby.

Shell scripts are a powerful tool that allows you to execute a series of commands in a specific order. This can be useful for automating repetitive tasks or complex processes that require multiple steps.

In some cases, shell scripts may not be the best tool for the job. For example, if you need to connect to a database or perform more complex logic, using a programming language like Ruby or Python may be more appropriate. However, for simple tasks, shell scripts can be a quick and efficient solution.

Let’s take a look at a sample shell script I recently wrote:


while true; do
  # Read the first 100 lines from ready.txt
  head -n 100 ready.txt > run.txt

  # Delete the first 100 lines from ready.txt
  sed -i '1,100d' ready.txt

  # Run my application
  example-application run.txt

  # Check if there is no data left in ready.txt, and exit the loop if true
  if [[ ! -s ready.txt ]]; then
    echo "no data left in ready.txt, exiting..."

  # Wait for 60 seconds before starting over
  sleep 60

Using other programming language such as C#, Java, Go, Ruby or Python, I am sure it will require more lines of code.

To improve my shell scripts skills, currently I am learning about sed and awk.