1. Create the following directory structure.

hello
├── five
│   └── six
│       ├── c.txt
│       └── seven
│           └── error.log
└── one
    ├── a.txt
    ├── b.txt
    └── two
        ├── d.txt
        └── three
            ├── e.txt
            └── four
                └── access.log

hello, one, two, three, four, five, six and seven are directories. The remaining items are empty files.

2. Print the locations of all the txt files in hello and its subdirectories.

3. Delete all the files with the .log extension.

4. Add the following content to a.txt

Unix is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix, development starting in the 1970s at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.

5. Compress the hello directory into a zip file

6. Copy all the contents of hello into another directory called world

7. Delete the hello directory

1. Download the contents of "Harry Potter and the Goblet of fire" using the command line from https://raw.githubusercontent.com/bobdeng/owlreader/master/ERead/assets/books/Harry%20Potter%20and%20the%20Goblet%20of%20Fire.txt

2. Print the first three lines in the book

3. Print the last 10 lines in the book

Use pipes to solve the following problems:

Refer

• https://swcarpentry.github.io/shell-novice/04-pipefilter/index.html
• https://ryanstutorials.net/linuxtutorial/piping.php
• https://www.geeksforgeeks.org/piping-in-unix-or-linux/

to learn about pipes

4. How many times do the following words occur in the book?

   • Harry
   • Ron
   • Hermione
   • Dumbledore

5. Print lines from 100 through 200 in the book

6. How many unique words are present in the book?

1. List your browser's process ids (pid) and parent process ids(ppid)
2. Stop the browser application from the command line
3. List the top 3 processes by CPU usage.

Use apt (Ubuntu) or homebrew (Mac) to:

1. Install git, vim and nginx
2. Uninstall nginx

1. What's your local ip address?
2. Find the ip address of google.com
3. Where is the python command located? What about python3?