Nano and editing · Lesson 1 of 27 · 10 minutes

Editing with nano

Open the simulated nano editor, save a text file, and verify your change.

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learner@clairos:~ $

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Your objectives

Hints are always available. Wrong turns never cost XP.

1
Create a lab folder
Run mkdir -p lab so the note has a safe sandbox folder.
Hint & worked example
Create a directory. -p also creates missing parent directories and accepts an existing directory.
The command outcome must match the task, including successful access or the explicitly requested failure.
```
mkdir -p lab
```
Remember: Creating a folder does not change the current directory.
2
Open nano
Run nano lab/incident-notes.txt. Save a nonempty note using the worked example below. Required evidence: status=reviewed; evidence=recorded; rollback=ready.
Hint & worked example
Edit a virtual text file using the browser editor and explicitly save it.
The command outcome must match the task, including successful access or the explicitly requested failure.
```
nano lab/incident-notes.txt
```
Save this example in the editor:
```
# Editing with nano
status=reviewed
evidence=recorded
rollback=ready
```
Remember: Opening the editor does not complete a write task. Save and verify the contents.
3
Verify the note
After saving, run cat lab/incident-notes.txt.
Hint & worked example
Read one or more files to standard output without editing their contents.
The command outcome must match the task, including successful access or the explicitly requested failure.
```
cat lab/incident-notes.txt
```
Remember: Reading a source file should precede changing it; avoid printing real secrets.
4
Inspect metadata
Run stat lab/incident-notes.txt.
Hint & worked example
Inspect a file or directory metadata record, including ownership, permissions, and size.
The command outcome must match the task, including successful access or the explicitly requested failure.
```
stat lab/incident-notes.txt
```
Remember: Metadata and file contents answer different questions.

Understand the pattern

Reading back changes is a simple habit that prevents confusion.

mkdir: Create a directory. -p also creates missing parent directories and accepts an existing directory.
Creating a folder does not change the current directory.
nano: Edit a virtual text file using the browser editor and explicitly save it.
Opening the editor does not complete a write task. Save and verify the contents.
cat: Read one or more files to standard output without editing their contents.
Reading a source file should precede changing it; avoid printing real secrets.
stat: Inspect a file or directory metadata record, including ownership, permissions, and size.
Metadata and file contents answer different questions.

Worked example and expected result

$ mkdir -p lab

(no output; exit 0)