Challenge: Extract information from a text file - Linux Tutorial

(upbeat music) - [Instructor] One of the common ways hackers try to break into computers is by attempting to log in remotely with randomly generated usernames or with usernames commonly used by popular services. The service that monitors login attempts writes information about those connection attempts into a system log file. So while this kind of activity is going on, we have a record of these attempts. In the exercise files, there's an archive called log.tar.gz and it contains a log file with a lot of attempted connections. Here's a challenge to help practice what we've seen so far. The task is to extract the file so we can work with it as text and look for lines containing invalid user authorization requests. Let's use what we've learned to create a file containing the usernames our would-be hacker tried to use to log in. Remember to use the tools we've learned about to browse through text, to rearrange text…