View source for Worksheet 2 - Nano commands

=Command challenge exercise using nano on a Raspberry Pi=

Each challenge introduces the basics of the nano editor and teaches students common tasks, helping them become comfortable with the command-line text editor.

Note, that if you are outside the '''/home/pi''' (user home directory) you will need to preface each instruction with '''sudo''' so that you have superuser privileges.

For these examples create a testing folder in the '''/home/pi/nano_test''' so that you can practise these activities.

==Open a File in nano==
Instruction: Open an existing file using nano.

<syntaxhighlight lang="bash">
Command: nano filename.txt
</syntaxhighlight>

Challenge: Open a file called welcome.txt and add the text "Welcome to the Raspberry Pi" at the beginning.

==Save and Exit nano==
Instruction: Learn how to save a file and exit.

<syntaxhighlight lang="bash">
Command: Press CTRL + O (to save) and CTRL + X (to exit).
</syntaxhighlight>

Challenge: After modifying welcome.txt, save the changes and exit nano.

==Search for Text==
Instruction: Use nano's search feature to find specific words or phrases.

<syntaxhighlight lang="bash">
Command: Press CTRL + W and type the word you want to find.
</syntaxhighlight>

Challenge: Search for the word "Raspberry" in welcome.txt and confirm its position.

==Cut and Paste Text==
Instruction: Use nano to cut and paste text.

<syntaxhighlight lang="bash">
Command: Move the cursor to the start of the line and press CTRL + K (cut) and CTRL + U (paste).
</syntaxhighlight>

Challenge: Cut the line that contains "Welcome to the Raspberry Pi" and paste it at the end of the file.

==Copy and Paste Text==
Instruction: Use the copy and paste commands in nano.

* CTRL + 6 to mark the start of the selection. 
* Once you have made the selection, you can use ALT + 6 to copy it. 
* You can paste all your copied data within the nano text editor by pressing CTRL + U 

Challenge: Copy the first two lines of the file and paste them at the end.

==Copy and Past Text into Nano using the Mouse==
You can also copy and paste text using the Right-Mouse-Button on the mouse. This is useful when you need to copy code from a web page into nano.

==Undo and Redo Changes==
Instruction: Undo and redo changes in nano.

<syntaxhighlight lang="bash">
Command: Press ALT + U to undo and ALT + E to redo.
</syntaxhighlight>

Challenge: Undo the last action you performed, and then redo it.


==Jump to a Specific Line==
Instruction: Jump to a specific line number in the file.

<syntaxhighlight lang="bash">
Command: Press CTRL + _ (underscore), then type the line number.
</syntaxhighlight>

Challenge: Jump to line 5 in welcome.txt.


==Insert the Current Date and Time==
Instruction: Insert the current date and time in nano.

<syntaxhighlight lang="bash">
Command: Press CTRL + T (in some configurations) or manually type the date.
</syntaxhighlight>

Challenge: Insert today's date and time at the end of the file.


==Open nano in Read-Only Mode==
Instruction: Learn how to open a file in read-only mode.

<syntaxhighlight lang="bash">
Command: nano -v filename.txt (use -v for read-only).
</syntaxhighlight>

Challenge: Open the welcome.txt file in read-only mode and attempt to modify it. Note what happens.

==Enable Syntax Highlighting==
Instruction: Enable syntax highlighting in nano (for Python or other languages).  To enable syntax highlighting in nano on a Raspberry Pi (or in most Linux environments), follow these steps to modify the ~/.nanorc configuration file:

Open the nano configuration file: You need to edit or create a file called .nanorc in your home directory to enable syntax highlighting.

<syntaxhighlight lang="bash">
nano ~/.nanorc
</syntaxhighlight>

Include syntax definitions: Add the necessary syntax definitions for the languages you want highlighted. You can either manually write these or include existing files provided by nano. For instance, to enable Python highlighting, add the following line:

<syntaxhighlight lang="bash">
include /usr/share/nano/python.nanorc
</syntaxhighlight>

You can include definitions for other languages too, like:

<syntaxhighlight lang="bash">
include /usr/share/nano/c.nanorc
include /usr/share/nano/sh.nanorc
include /usr/share/nano/html.nanorc
</syntaxhighlight>


Save the file: Once you've added the syntax highlighting rules, press Ctrl + O to write the changes, then press Enter to confirm, and finally press Ctrl + X to exit nano.

Test your setup: Open a Python or another supported file with nano, and you should now see syntax highlighting applied automatically.

Challenge:
* Enable syntax highlighting for at least 3 different languages (e.g., Python, C, HTML).
* Create a Python script in nano and check if the syntax highlighting is working.