Join Scott Simpson for an in-depth discussion in this video Solution: Extract information from a text file, part of Learning Linux Command Line.
- [Voiceover] So let's take a look at how…I solved this challenge.…The file that we were provided was an archive…so the first step that I took was to write…tar -xvf log.tar.gz.…And that created a file called auth.log.…As I'm sure you found out, that file's…hundreds of lines long.…So, I wanted to get a sense of what I was…looking for.…Next I wrote cat auth.log just to take a look…at all the text.…And scrolling around I started seeing…invalid user login attempts.…Here for media and further up for other names.…
Like deploy, demo, SVH and so forth.…Each of these lines has this string;…input_userauth_request.…So I know I can look for that.…And on these lines the username…occurs at a specific position.…I can count from the left.…One, separator, two, three, four,…five, six, seven, eight, nine.…
On each of these lines that say…input_userauth_request it's the ninth item.…So, I'll clear the screen and let's…start writing out the command that I used…to solve the problem.…First I wrote cat auth.log and that gets…the text from the file into my stream.…
This course will establish the foundation for more advanced Linux topics. Find other Linux training courses here.
- What is the Linux command line?
- Writing Linux commands at the prompt
- Finding help for Linux commands
- Editing files and folders
- Configuring user roles and file permissions
- Using pipes to connect commands
- Peeking at files
- Searching and editing text
- Finding disk and system information
- Installing and updating software
Skill Level Beginner
1. Command-Line Basics
2. Files, Folders, and Permissions
3. Common Command-Line Tasks and Tools
4. A Peek at Some More Advanced Topics
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