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Tutorial3: Advanced File Management / Quoting Special Characters

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→‎INVESTIGATION 3: QUOTING SPECIAL CHARACTERS

= INVESTIGATION 3: QUOTING SPECIAL CHARACTERS =

In this section, you will learn 3 three unique methods to quote special characters ~~so they behave only like text~~.

:'''Perform the Following Steps:'''

# Issue the following Linux command: echo hello there '''NOTE:''' the '''echo''' command is used to display text onto your terminal.

# Issue the following Linux command: echo * hello * What happened? What is shown in addition to the text "hello". Why do you think those filenames are also being displayed?

# Issue the following Linux command: echo \* hello\* What do you notice? What does the \ character do?

# Issue the following Linux command: echo "* hello *" Is there a difference between this command and the previous command?

# Issue the following Linux command: echo '* hello *' Is there any difference between this command and the two previous commands?

# Issue the following Linux command: echo $USER '''NOTE''': '''USER ''' is an environment variable that stores the current user's login name. The '''$ ''' character immediately followed by the environment name causes it to expand to the value that the variable contains. Therefore the echo command displays the current login name of the user.

# Issue the following Linux command (using single quotes): echo '$USER' What happened? Why is the output display like this?

# Issue the following Linux command (using double quotes): echo "$USER" What happened? Why?

# Let's use quoting special characters for a couple of other commands. Move to the '''lesson2''' directory. Confirm that you are currently located in the ''lesson2'' directory.

# Issue the following Linux command: cp /bin/ls .

# Issue the '''ls''' command to verify that there are copied files in your lesson2 directory. '''NOTE: ''' Although it is NOT RECOMMENDED to create a filename using a special character (remember that file naming rule?), we will create an empty file called "*"

# Issue the following Linux command (using single quotes): touch '*'

# Issue the '''ls''' command. Do you now see a file called "*" in addition to the other copied files?

# Issue the following Linux command to remove the file called "*": rm *

# Issue the '''ls''' command to view the files in your current directory. What happened?!? Why is it dangerous to use special characters when creating filenames?

# Issue the following Linux command: cp /bin/ls .

# Issue the following Linux command (using single quotes): touch '*'

# Issue the following Linux command (using single quotes): rm '*'

# Issue the '''ls''' command to confirm that the file called "*" has been in your current directory. What happened this time?

# After you complete the Review Questions sections to get additional practice, then work on your '''online assignment 1 ''' and complete the '''remaining''' sections 3 to 6 labelled: '''Directory Management''' , '''Practice Commands To Create A Directory Structure''' , '''Create A Directory Structure''' and '''Practice Specifying Path Names'''. When you have completed these remaining sections, and you main menu indicates you have completed 6 out of 6 sections, then you will have successfully completed your assignment #1.

= LINUX PRACTICE QUESTIONS =

Msaul

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