nano text editor in Linux CLI - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

What is the output of the nano command when opening a new file?

You run the command nano newfile.txt in a terminal where newfile.txt does not exist. What will nano display?

Linux CLI

nano newfile.txt

A A prompt asking if you want to create the file before opening nano.

B An error message saying "File not found" and nano exits immediately.

C The contents of the last edited file open in nano.

D An empty editor screen with the message "New Buffer" at the top and the nano help menu at the bottom.

💡 Hint

Think about what happens when you open a file that doesn't exist in nano.

Nano opens a new empty buffer for the file and shows "New Buffer" at the top. It does not error or prompt before creating the file.

💻 Command Output

intermediate

What happens when you press Ctrl+O in nano?

While editing a file in nano, you press Ctrl+O. What does nano do?

A It exits nano without saving changes.

B It opens a new file for editing.

C It saves the current contents to the file and prompts for confirmation of the filename.

D It copies the selected text to the clipboard.

💡 Hint

Ctrl+O is often used for output or saving in editors.

Ctrl+O in nano writes the current buffer to the file and asks for the filename to save as, defaulting to the current file.

🔧 Debug

advanced

Why does this nano command fail to open the file?

You run nano /root/secret.txt as a normal user and get a "Permission denied" error. Why?

Linux CLI

nano /root/secret.txt

A Because the user does not have permission to read or write files in the /root directory.

B Because nano does not support opening files outside the home directory.

C Because the file /root/secret.txt does not exist.

D Because nano requires the file to be owned by the user running it.

💡 Hint

Consider Linux file permissions and user privileges.

The /root directory is restricted to the root user. Normal users cannot open files there without sudo or root access.

🚀 Application

advanced

How to search for a word in nano?

You want to find the word "apple" in a file opened with nano. Which key combination do you press and what do you type next?

A Press Ctrl+F, then type "apple" and press Enter to search.

B Press Ctrl+W, then type "apple" and press Enter to search.

C Press Ctrl+S, then type "apple" and press Enter to search.

D Press Ctrl+G, then type "apple" and press Enter to search.

💡 Hint

Ctrl+W stands for 'Where is' in nano.

Ctrl+W opens the search prompt in nano. You then type the search term and press Enter.

🧠 Conceptual

expert

What is the effect of pressing Ctrl+X in nano when unsaved changes exist?

You have edited a file in nano but not saved it yet. You press Ctrl+X to exit. What happens next?

A Nano asks if you want to save the changes before exiting.

B Nano exits immediately and discards all changes.

C Nano locks the file and prevents exiting until saved.

D Nano saves the file automatically and then exits.

💡 Hint

Think about how editors protect your work.

Nano prompts to save changes if there are unsaved edits before exiting to prevent data loss.