## Exercise 5

 1. Write a shell script that prints the vendor, year and name (in this order)
    of each operating system from ‹oslist.csv›, sorted by vendor first and name
    second.
 2. Hint: try the following command:
    
        $ echo 'hello,world' | sed -re 's:([^,]*),([^,]*):\2,\1:'
