Homework #1

For this assignment, create a single text file in nano called homework1.txt and provide the sequence of commands needed for each problem.

Important

All work must be your own.

You may not use generative AI / large-language models for any part of this assignment.

1. Starting in your home directory:

   • Create the directory structure:

     ~/homework/1/files/
     

   • Now move into the files/ sub-directory you created, and create a file called problem.txt using the touch command.

2. For this problem we will use the same directory-structure/files from the shell lessons (see Some Sample Data to remember how to get this).

   • Change to the directory:

     ~/shell-lesson-data/exercise-data/alkanes
     

   • Now make a subdirectory under that called tests/ and change directory into tests/.

   • From within tests/ copy the files cubane.pdb, ethane.pdb, and octane.pdb from the directory above into your current directory. You should use a single command for it.

3. Let’s consider two ways to do the same task—moving a file to a new location. We want to move a file ~/answer.txt to ~/homeworks/answer.txt

   • Method 1: copy + delete

     • In your home directory, create a file called answer.txt using touch

     • Create a directory called homeworks/

     • Copy the file answer.txt into homeworks/

     • Delete the version of answer.txt in your home-directory (only the version homeworks/answer.txt) should remain.

   • Method 2: moving

     • Back in your home directory, create a file named answer2.txt (again using touch).

     • Move this file, using a single command, into the homeworks/ directory you created previously.

4. Using man ls, find the option/flag that sorts files by size (largest file first). In addition to this new option, also use the -l option to get a long listing.

   • Give the ls command that will do this sorting + long listing

   • In ~/shell-lesson-data/exercise-data/alkanes/, show the (long-listing) output when you sort by size