Coursera-DE-C2-Standard-Streams

Standard Streams Lab for Coursera

Goal: Learn to work with streams

Let's practice working with Bash Streams

Part 1: Create a new file and write to it via stdout

1. Run the following command in your Bash terminal: echo "fruit" > meal.txt
2. Read the output of the file using the cat command: cat meal.txt
3. Explain what happened?

Part 2: Append new data to the file by using stdout

1. Run the following command in your Bash terminal: echo "chocolate" >> meal.txt
2. Read the output of the file using the cat command: cat meal.txt
3. Explain what happened?
4. How could you write more data to the file?

Part 3: Redirect standard input

1. Use the tr command to substitute characters by reading standard input: tr fruit steak < meal.txt
2. What output do you see?
3. Could you improve this result? How?

Part 4: Throwaway stdout to /dev/null

1. Send the output of standard out to /dev/null via cat meal.txt > /dev/null
2. Explain what happened?
3. Why would you want to send the output of a command to /dev/null?