Mastering Linux Shell Scripting - Second Edition

Questions

1. Suppose you have a file with the following content:

Hello, sed is a powerful editing tool. I love working with sedIf you master sed, you will be a professional one

And suppose you use the following command:

$ sed 's/Sed/Linux sed/g' myfile 

How many lines will be substituted?

2. Suppose you have the same file that was used in the previous question and you use the following command:

$ sed '2d' myfile  

How many lines will be deleted from the file?

3. What is the location of the inserted line in the following example?

$ sed '3a\Example text' myfile  

4. Suppose you have the same previous sample file and you run the following command:

$ sed '2i\inserted text/w outputfile' myfile  

How many lines will be saved to the output file?