Chapter 3: Command Line Basics

3.1.2 Exercises

1. Print your name to the terminal.

    $ echo SuperMoudy
   

2. Clear your terminal after completing #1.

    $ clear
   

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3.2.2 Exercises

1. Set your working directory to the root directory.

    $ cd /
   

2. Set your working directory to your home directory using three different commands.

   • Method 1:

      $ cd
     

   • Method 2:

      $ cd ~
     

   • Method 3: Absolute Path

      $ cd /path/to/your/home/directory
     

3. Find a folder on your computer using your file and folder browser, and then set your working directory to that folder using the terminal.

    $ cd path/to/the/folder
   

4. List all of the files and folders in the directory you navigated to in #3.

    $ ls folder
   

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3.3.2 Exercises

1. Create a new directory called workbench in your home directory.

    $ cd
   
    $ mkdir workbench
   

2. Without changing directories create a file called readme.txt inside of workbench.

    $ touch workbench/readme.txt
   

3. Append the numbers 1, 2, and 3 to readme.txt so that each number appears on it’s own line.

    $ echo 1 > workbench/readme.txt
   
    $ echo 2 >> workbench/readme.txt
       
    $ echo 3 >> workbench/readme.txt
   

4. Print readme.txt to the command line.

    $ cat workbench/readme.txt
   

5. Use output redirection to create a new file in the workbench directory called list.txt which lists the files and folders in your home directory.

    $ ls > workbench/list.txt
   

6. Find out how many characters are in list.txt without opening the file or printing it to the command line.

    $ wc -c workbench/list.txt
   

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3.4.2 Exercises

1. Create a file called message.txt in your home directory and move it into another directory.

    $ cd
       
    $ touch message.txt
       
    $ mv message.txt path/to/another/directory
   

2. Copy the message.txt you just moved into your home directory.

    $ cd
       
    $ cp path/to/another/directory/message.txt message.txt
   

3. Delete both copies of message.txt. Try to do this without using rm.

   We firstly want to find an alternative to rm:

    $ apropos remove
   

   Found a command called unlink

    $ unlink message.txt path/to/another/directory/message.txt